Which of the following statements contain a variable? A. The time it takes to wash the dishes plus 30 minutes.

B. The age of my friend.

C. The number of kittens in a litter.

D. There are 24 hours in a day.

Answers

Answer 1

Answer:

Thetimeittakestowashthedishesplus30minutes

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Find the sum of the following nine products: 1 × (10 – 1), 2 × (10 – 2), 3 × (10 – 3), … , 9 × (10 – 9)

Answers

Answer:

165

Step-by-step explanation:

We solve the first 5

1*(10-1)=9

2*(10-2)=16

3*(10-3)=21

4*(10-4)=24

5*(10-5)= 25

and notice

when you go from 6 on its getting the same number because say 3*(10-3) = 3*7 and 7*(10-7) = 7*3 and 7*3 = 3*7 so

You add the first 5 integer you solved up

9 16 21 24 25 = 95

and then you double it no extra 25

and then you get 165 = answer

Answer:

9, 16, 21, 9

Step-by-step explanation:

I hope this help and it was going in order

Please help! I'll mark your answer as brainliest if right <3

Answers

Answer:

dowload the snap slove aap and then crop ans it give u a correct ans

The correct answer should be y = (-8/3)x + 9

If sin x= (sqrt 2)/2 and tan x=-1 what is sec x

Answers

Answer:

$-(2)/(√(2))$ or $-√(2)$

Step-by-step explanation:

$\sec{x}$ is the reciprocal of $cos(x)$ , or in symbols: $\sec{x}=(1)/(cos(x))$ . $tan(x)$ is also the ratio of $sin(x)$ to $cos(x)$ , and we can multiply both sides of the equation $tan(x)=(sin(x))/(cos(x))$ by $(1)/(sin(x))$ to get the equation $(tan(x))/(sin(x))=(1)/(cos(x))$ . Of course, this is just the definition of $\sec{x}$ , so we can rewrite this fact as $\sec{x}=(tan(x))/(sin(x))$ .

In this problem, we're given that $sin(x)=(√(2) )/(2)$ and $tan(x)=-1$ , so plugging those two values into our equation gives us

$\sec{x}=(-1)/((√(2))/(2)) =-(2)/(√(2))$

We could leave our solution as $-(2)/(√(2))$ , or we could rationalize the denominator to get a solution of

$-(2)/(√(2))\cdot(√(2))/(√(2))=-(2√(2))/(2)=-√(2)$

Designer Dolls, Inc. found that the number N of dolls sold varies directly with their advertising budget A and inversely with the price P of each doll. The company sold 5200 dolls when $26,000 was spent on advertising and the price of a doll was set at $30. Determine the number of dolls sold when the amount spent on advertising is increased to $52,000. Round to the nearest whole number. Question 10 options: 3,447 dolls 10,400 dolls 5,200 dolls 1,723 dollsA.3,447 dolls
B.10,400 dolls
C.5,200 dolls
D.1,723 dolls

Answers

Direct variation: y = kx
Inverse variation: y = k/x

Using the information above about direct and inverse variation, we get this general equation.

N = kA/P

Now we use the given information to find the value of the constant, k.

5200 = k * 26,000/30

k = 6

Now we know k, so we can write the equation for this case.

N = 6A/P

A = 52,000

N = 6 * 52,000/30

N = 10,400

We did not recieve a diagram for this question.Radius of circle O has a slope of 2.5. What is the slope of the line tangent to circle O at point A?

A)0.8
B)2.5
C)-0.4
D)-5

Answers

If the line is tangent to circle at point A and the radius ( suppose AO) has a slope of 2.5 then a slope of the tangent line is :
$(-1)/(2.5)= -0.4$
Explanation: The product of slopes of two perpendicular lines is -1. To get second slope we have to divide -1 by the first one.
Answer:C) - 0.4

An item costs $20.00 and it has a sales tax rate of 4%. What is the amount of sales tax for that item?