# ∠A and ∠B are complementary angles of right triangle ABC, cos A = 0.83, and cos B = 0.55. What is sin A + sin B? A) 0.28 B) 1 C) 0.38 D) 1.38

QUESTION POSTED AT 18/01/2020 - 06:07 AM

1.38

Step-by-step explanation:

## Related questions

### 1. For a few months, Dexter recorded the amounts, in fluid ounces, of laundry detergent remaining y after he and his family washed x loads of laundry. The equation of the line of best fit for his data is shown below. y = -1.6x + 50 Which statement correctly describes the slope of Dexter’s equation of the line of best fit in the context of the situation? A. The bottle Dexter’s family buys holds about 50 fluid ounces of detergent. B. For each load of laundry, Dexter’s family used about 1.6 fluid ounces of detergent. C. With 50 fluid ounces of detergent, Dexter’s family can wash about 1.6 loads of laundry. D. With 1.6 bottles of laundry detergent, Dexter’s family can wash about 50 loads of laundry. Answer: _______ (2 points)

The answer would be B simply because it sounds more reasonable.

ANSWERED AT 19/02/2020 - 04:59 PM

QUESTION POSTED AT 19/02/2020 - 04:59 PM

### A recipe asks for cup of milk. How much milk is needed to make of the recipe? A. cup B. cup C. cup D. 1 cup

C, it's always c, when in doubt, pick c

ANSWERED AT 19/02/2020 - 04:28 PM

QUESTION POSTED AT 19/02/2020 - 04:28 PM

### In order for Brady to earn a B in his biology course, his test scores must average at least 80%. On the first 5 tests, he has an average of 77%. There is one test remaining in the course.

He has to make a 95.

77*5=385
80*6(tests)=480

480-385=95

ANSWERED AT 19/02/2020 - 03:56 PM

QUESTION POSTED AT 19/02/2020 - 03:56 PM

### What kind of growth model (pattern) is shown in the table? x y 1 5 2 25 3 125 4 625 5 3,125 a. square root b. linear c. exponential d. quadratic

Option C is correct.

The kind of growth model is shown in the table is exponential

Step-by-step explanation:

Exponential growth function is in the form of : ......;   where a is the initial value and b> 0.

Consider any two point from the table:

(1 , 5) and ( 2 , 25)

Substitute these in the equation  we get; ...... ......

Divide equation  by  we have; Simplify: Now substitute this value in equation  we get; Divide both sides by 5 we get; Simplify:

1=a or a = 1

Therefore, the table shown the  exponential growth function is, ANSWERED AT 19/02/2020 - 03:44 PM

QUESTION POSTED AT 19/02/2020 - 03:44 PM

### State the property that is demonstrated: 3 · (8 · 4) = (3 · 8) · 4. A. Commutative B. Associative C. Distributive D. Additive

I believe it's the associative

ANSWERED AT 19/02/2020 - 03:19 PM

QUESTION POSTED AT 19/02/2020 - 03:19 PM

### Which of the following best describes the solution to the system of equations below? 7x + 4y = 8 7x + 4y = 13 A. The system of equations has exactly one solution where x=8 and y=13 . B. The system of equations has infinitely many solutions. C. The system of equations has no solution. D. The system of equations has exactly one solution where x=0 and y=2 .

ANSWERED AT 19/02/2020 - 01:34 PM

QUESTION POSTED AT 19/02/2020 - 01:34 PM

### A line has a slope of - 4/5. Which ordered pairs could be points on a line that is perpendicular to this line? Check all that apply. a. (-2,0) and (2,5) b. (-4,5) and (4,-5) c. (-3,4) and (2,0) d. (1,-1) and (6,-5) e. (2,-1) and (10,9)

we know that

if two lines are perpendicular

then the product of their slopes is equal to minus one

so in this problem we have the value of m2 must be equal to we know that

The formula to calculate the slope between two points is equal to Find the slopes of each of ordered pairs and compare with m2

case a) Substitute in the formula  The slope is equal to m2

so

The ordered pair case a)  could be points on a line that is perpendicular to the given  line

case b) Substitute in the formula   The slope is not equal to m2

so

The ordered pair case b)  could not be points on a line that is perpendicular to the given  line

case c) Substitute in the formula  The slope is not equal to m2

so

The ordered pair case c)  could not be points on a line that is perpendicular to the given  line

case d) Substitute in the formula  The slope is not equal to m2

so

The ordered pair case d)  could not be points on a line that is perpendicular to the given  line

case e) Substitute in the formula   The slope is equal to m2

so

The ordered pair case e)  could be points on a line that is perpendicular to the given  line

therefore ANSWERED AT 19/02/2020 - 01:33 PM

QUESTION POSTED AT 19/02/2020 - 01:33 PM

### Find side b if a =10 inches and side c = 16 inches.

Then it would be 52inches or 160 inches depends of your looking for area or perimeter

ANSWERED AT 19/02/2020 - 12:49 PM

QUESTION POSTED AT 19/02/2020 - 12:49 PM

### 1. Solve 3n + 11 < 17 or -3n > 12. Which is the best description of the solution set? A. n < 2 or n > -4 B. n < -4 C. n < 2 D. n < 2 or n < -4 2. Solve 4x < 2x - 10 and -3x > -12. Which is the best description of the solution set? A. x < -5 and x < 4 B. x < -5 C. x < 4 D. x < -5 or x > 4

1-b
2-c
good luck .......

ANSWERED AT 19/02/2020 - 12:22 PM

QUESTION POSTED AT 19/02/2020 - 12:22 PM

### In the figure below, CEF is an equilateral triangle. Points B, C and E are collinear; Points A, C and F are collinear; g = 40 degrees; and k = 45 degrees. Find angle l. Show all work.

There exists the same question with the figure as shown in the attachment.

The given are:
g = 40 degrees
k = 45 degrees

angle of " l "

So this is how to solve this:

Step 1:
Since CEF is an equilateral triangle, then each has 60 degrees.
i is equal to l because they are opposite angles

Step 2:
angle l is inside CEF, then the value of angle l is 60

ANSWERED AT 19/02/2020 - 12:21 PM

QUESTION POSTED AT 19/02/2020 - 12:21 PM

### The population f(x), in millions, of State A of a country after x years is represented by the function shown below: f(x) = (1.08)x The graph shows the population g(x), in millions, of State B of the country after x years: Graph of function g of x equals 2 multiplied by 1.08 to the power of x Which conclusion is correct about the population of State A and State B? The original population of State B was half of the original population of State A. The original population of State A was half of the original population of State B. The original population of State B was one-fourth of the original population of State A. The original population of State A was one-fourth of the original population of State B.

-- State-A . . . Population = 1 · (1.08)ˣ

-- State-B . . . Population = 2 · (1.08)ˣ

' x ' = number of years after the original population
At the beginning, x=0.
Any quantity raised to the zero power = 1.
At the beginning, when x=0, the original populations were
State-A  =  1 · 1  =  1
State-B  =  2 · 1  =  2

The original population of State A was half of
the original population of State B.

ANSWERED AT 19/02/2020 - 11:53 AM

QUESTION POSTED AT 19/02/2020 - 11:53 AM

### Use the attached image to answer problems A-C. Show all work. A. Calculate the value of x. B. Calculate the value of MN C. Calculate the value of NP.

B. Calculate the value of MN

ANSWERED AT 19/02/2020 - 11:52 AM

QUESTION POSTED AT 19/02/2020 - 11:52 AM

### Evaluate the square root. /42 A. 7 B. 24.5 C. 98 D. 2401

Sqrt(42)= 6.487406984078602

ANSWERED AT 19/02/2020 - 11:03 AM

QUESTION POSTED AT 19/02/2020 - 11:03 AM

### A cold front passed through a city, and the temperature dropped from 69°F to 54.6°F in 8 hours. Assuming the temperature dropped at a constant rate, at what rate did the temperature decrease? A. 2.9°F per hour B. 14.4°F per hour C. 1.8°F per hour D. 1.4°F per hour

ANSWERED AT 19/02/2020 - 10:42 AM

QUESTION POSTED AT 19/02/2020 - 10:42 AM

### 4. Let f(x)=-2x+7 and g(x)=-6x+3. Find f×g and state its domain A. 12x^2-48x+21;all real numbers B. -14x^2+36x-18;all real numbers except x=7 C. -14x^2+36x-18;all real numbers D. 12x^2-48x+21;all real numbers except x=1

I hope this helps you

(f.g) (x)=(-2x+7)(-6x+3 )

(f.g)(x)=12x^2-6x-42x+21

(f.g)(x)=12x^2-48x+21

A

ANSWERED AT 19/02/2020 - 10:19 AM

QUESTION POSTED AT 19/02/2020 - 10:19 AM

### Tara's car accelerated from 10 miles per hour to 70 miles per hour in 12 seconds. What is the approximate rate of change in the miles per hour that Tara's car accelerated? A) 5 miles per hour per second B) 8 miles per hour per second C) 18 miles per hour per second D) 48 miles per hour per second

5 miles per second. The speed increased from 10-70 so 60 mps but it happened in 12 seconds so, you would divide 60 by 12 to get 5.

ANSWERED AT 19/02/2020 - 10:08 AM

QUESTION POSTED AT 19/02/2020 - 10:08 AM

### If P(A) = 1/2, P(B) = 0, then P(A Î B) is???

It is given that P(A) = 1/2 and P(B) = 0
P(A Î B) = P (A ∩ B) / P(B) = P (A ∩ B)/0

As zero is in the denominator, the expression can't be defined.

In short, final answer is not defined.

Hope it helped.

ANSWERED AT 19/02/2020 - 09:40 AM

QUESTION POSTED AT 19/02/2020 - 09:40 AM

### Divide mentally. 1.2 ÷ 3,000 = ? a. 0.4 b. 0.04 c. 0.004 d. 0.0004

i believe its D!

Step-by-step explanation:

ANSWERED AT 19/02/2020 - 01:14 AM

QUESTION POSTED AT 19/02/2020 - 01:14 AM

### Triangles RQS and NTV have the following characteristics: • Right angles at ∠Q and ∠T • RQ ≅ NT Can it be concluded that ΔRQS ≅ ΔNTV by SAS? Why or why not? a. Yes, one set of corresponding sides and one corresponding angle are congruent. b. Yes, they are both right triangles. c. No, it is necessary to know that another set of corresponding sides is congruent. d. No, it is not possible for the triangles to be congruent

SAS stands for "side, angle, side" and means that we have two triangles where we know two sides and the included angle are equal. If two sides and the included angle of one triangle are equal to the corresponding sides and angle of another triangle, the triangles are congruent.

In the given triangles RQS and NTV ,RQ ≅ NT and <∠Q ≅ ∠T .We need one more side to be equal to prove the triangles to be congruent.

Among all the options option  c. No, it is necessary to know that another set of corresponding sides is congruent is the right answer.

ANSWERED AT 19/02/2020 - 01:06 AM

QUESTION POSTED AT 19/02/2020 - 01:06 AM

### The sum of the interior angles of an n-gon is _____(n - 2). 360° 180° 270° 540°

The sum of the interior angles of an n-sided polygon can be calculated using formula It is easy to verify:

1. If n=3 (the smallest possible number of sides for polygon), then the polygon is triangle and the sum of the measures of interior angles of triangle is always 180° .

2. If n>3, draw (n-3) diagonals from one vertex. This diagonals partition the polygon into (n-2) triangles. Thus, the sum of the interior angles of an n-sided polygon is equal to the sum of the measures of interior angles of (n-2) triangles that is ANSWERED AT 19/02/2020 - 01:06 AM

QUESTION POSTED AT 19/02/2020 - 01:06 AM

### Which is an equation in a slope intercept form for the line passing through (5,1) and (-4,7) A: y=-2/3x+13/3 B: y=-2/3x-13/3 C: y=2/3x-13/3 D: y=2/3x+13/3

tbch i plugged them into a graphing calculator... ,:D too tired atm

ANSWERED AT 19/02/2020 - 01:00 AM

QUESTION POSTED AT 19/02/2020 - 01:00 AM

### Joylin receives a $50 gift card for the local movie theater for her birthday. She uses the card to purchase tickets and snacks for her family. If Joylin spends$6 more on tickets than she does on snacks, how much does Joylin spend on tickets? A)$19 B)$22 C)$28 D)$31

Step-by-step explanation:

Since we have given that

Value of gift card Joylin receives = $50 Let the amount she spends on snacks be x Let the amount she spends on movie tickets be x+6 So, according to question, we get So, Amount she spent on movie will be Hence, Option 'C' is correct. ANSWERED AT 19/02/2020 - 01:00 AM QUESTION POSTED AT 19/02/2020 - 01:00 AM ### A nest of ants initially contains 500 individuals. The population is increasing by 12% each week. a) How many ants will be there after : i. 10 weeks ii. 20 weeks b)How many weeks will it take for the ant population to reach 2000. Answer: a) (i) 1553 ants (ii) 4823 ants b) 12 weeks Step-by-step explanation: Given, The initial number of ants, P = 500, Also, the rate of increasing per week, r = 12% = 0.12, So, the number of ants after x weeks,  a) (i) If x = 10 weeks, The number of ants would be, (ii) If x = 20 weeks, The number of ants would be, b) If A = 2000  Taking log both sides, log(4) = xlog(1.12) x = 12.23 ≈ 12 weeks ANSWERED AT 19/02/2020 - 12:58 AM QUESTION POSTED AT 19/02/2020 - 12:58 AM ### Triangle XYZ has vertices X(1, 3), Y(0, 0), and Z(–1, 2). The image of triangle XYZ after a rotation has vertices X'(–3, 1), Y'(0, 0), and Z'(–2, –1). Which rule describes the transformation? Answer: Rotation about 90° counter clockwise (x , y) →→ ( -y, x ). Step-by-step explanation: Given : Triangle XYZ has vertices X(1, 3), Y(0, 0), and Z(–1, 2). The image of triangle XYZ after a rotation has vertices X'(–3, 1), Y'(0, 0), and Z'(–2, –1). To find : Which rule describes the transformation. Solution : We have given vertices X(1, 3) →→ X'(–3, 1) Y(0, 0) →→ Y'(0, 0), Z(–1, 2) →→ Z'(–2, –1). Here , we can see in each coordinates value of y become -x and x become y. (x , y) →→ ( -y, x ) this the rule of rotation about 90° counter clockwise. Therefore, rotation about 90° counter clockwise (x , y) →→ ( -y, x ). ANSWERED AT 19/02/2020 - 12:56 AM QUESTION POSTED AT 19/02/2020 - 12:56 AM ### Kelly has 15 blue bracelets and 12 green bracelets. What is the ratio of Kelly’s blue bracelets to green bracelets? A) 3 : 4 B) 4 : 5 C) 4 : 3 D) 5 : 4 15/12 simplified would be A) 3:4 ANSWERED AT 19/02/2020 - 12:55 AM QUESTION POSTED AT 19/02/2020 - 12:55 AM ### The numbers of cookies in a shipment of bags are normally distributed, with a mean of 64 and a standard deviation of 4. What percent of bags of cookies will contain between 60 and 68 cookies? A) 50% B)13.5% C)68% D)34% The answer is C I think ANSWERED AT 19/02/2020 - 12:53 AM QUESTION POSTED AT 19/02/2020 - 12:53 AM ### A triangle has vertices at R(1, 1), S(–2, –4), and T(–3, –3). The triangle is transformed according to the rule R0, 270°. What are the coordinates of S'? Answer The rule of rotation about the origin in counter-clockwise is given by: The rule of rotation of about the origin in clockwise is given by: Given the coordinates of triangle RST : R(1, 1) S(-2, -4) T(-3, -3) We have to find the coordinates of S' Apply the rule of rotation 270 degree counterclockwise on RST: To find the S' Apply the rule of rotation 270 degree clockwise we have; Therefore, the coordinates of S' counterclockwise is: (-4, 2) and clockwise is: (4, -2) ANSWERED AT 19/02/2020 - 12:49 AM QUESTION POSTED AT 19/02/2020 - 12:49 AM ### What is the name of a triangle that has two sides of equal length? Isosceles Triangle has 2 equals sides ANSWERED AT 19/02/2020 - 12:42 AM QUESTION POSTED AT 19/02/2020 - 12:42 AM ### Taylor buys 6 bus tickets. he pays for tickets with 20 dollar bill let c represent each cost of each ticket. I hope this helps you if 6 tickets$20

1 tickets \$ ?

?.6=1.20

?=20/6

?=3.3

ANSWERED AT 19/02/2020 - 12:39 AM

QUESTION POSTED AT 19/02/2020 - 12:39 AM

### What's the perimeter of a rectangle with length 12 m and width 5 m? A. 49 m B. 17 m C. 60 m D. 34 m

The answer is D. 34 m...Hope this helps.

ANSWERED AT 19/02/2020 - 12:37 AM

QUESTION POSTED AT 19/02/2020 - 12:37 AM