MATHEMATICS MIDDLE SCHOOL

Q is 3 more than half of x

Answers

Answer 1

Answer:

the answer is q=x/2+3\

brainliest plzzz thx god bless

Answer 2

Answer: x/2+3=Q is the equation

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the human heart pumps 750 gallons of blood in 9 hours. A human kidney filters 100 gallons of blood in 6 hours. How many more gallons of blood does the human heart pump than a human kidney filters during a 24 hour period?

Answers

The heart pumps 750*24/9=2000 gallons, and the kidney pumps 100*24/6=400 gallons. This is a difference of 2000-400=1600 gallons.

Help me with these questions and can you show how you got the answer

Answers

The first one is 200,000 divided by 10. The answer is 20,000.
For the second one, the tenths place is the one just on the right side of the decimal. Find the number right before it. If the number is 5 or higher, then you round up. It's 5, so round up, and get rid of the 2 at the end. Since you round up to 10, not 0, you need to add a 1 to the 8. Your answer should be 78.9

What is the value of y so that the ordered pair (2, y) is a solution to the equation 2x+y=-2?A.
–6

B.
–2

C.

D.
0

Answers

x=2
y=-2-2x=-2-4=-6
so you choose a

The function f(x) = 5One-fifth is reflected over the y-axis. Which equations represent the reflected function? Select two options.f(x) = One-fifth
f(x) = One-fifthOne-fifthOne-fifth
f(x) = 5One-fifth
f(x) = 5(5)x
f(x) = 5(5)–x

Answers

Answer:

The equations that represent the reflected function are

$f(x)=5((1)/(5))^(-x)$

$f(x)=5(5)^(x)$

Step-by-step explanation:

The correct question in the attached figure

we have the function

$f(x)=5((1)/(5))^(x)$

we know that

A reflection across the y-axis interchanges positive x-values with negative x-values, swapping x and −x.

therefore

$f(−x) = f(x).$

The reflection of the given function across the y-axis will be equal to

(Remember interchanges positive x-values with negative x-values)

$f(x)=5((1)/(5))^(-x)$

An equivalent form will be

$f(x)=5((1)/(5))^((-1)(x))=5[((1)/(5))^(-1))]^(x)=5(5)^(x)$

therefore

The equations that represent the reflected function are

$f(x)=5((1)/(5))^(-x)$

$f(x)=5(5)^(x)$

Answer:

c,d

Step-by-step explanation:

You place a mirror on the ground 6 feet from the lamppost. You move back 3 feet and see the top of the lamppost in the mirror. If you are 5 feet tall, what is the height of the lamppost?

Answers

Setting up a proportional relationship between mirror and lamppost, the height of the lamppost is 10 feets.

Height of person, Hp = 5 feets

Distance of person form mirror, Dp = 3 feets

Distance of Lampost from mirror, Dm = 6 feets

HeightofLampost=Hl=?

Setting up a proportional relationship :

$(Hp)/(Dp) = (Hl)/(Dm)$

$(5)/(3) = (Hl)/(6)$

Cross multiply :

Hl × 3 = 6 × 5

3Hl = 30

Hl = (30 ÷ 3)

Hl = 10

Therefore, the height of the lamppost is 10 feets.

Learn more :brainly.com/question/18109354

Answer: 10 feet

Step-by-step explanation:

Let h be the height of lamppost.

Since both the person and the lamppost are standing vertical to the ground, making similar right triangles.

Because the two triangles are similar, the ratio of their sides is the same.

Therefore, we have

$\frac{\text{height of lamppost}}{\text{distance of lampost from mirror}}=\frac{\text{height of person}}{\text{distance of person from mirror}}\n\n\Rightarrow(h)/(6)=(5)/(3)\n\n\Rightarrow\ h=(6*5)/(3)\n\n\Rightarrow\ h=10$

Hence, the height of the lamppost = 10 feet.

If (x-1) / x =20 , then x=

Answers

$( x-1 )/(x) =20 \n \n x\neq 0\n \n20x=x-1\n \n20x - x = -1\n \n19x = -1 \ \ / :19 \n \nx= -(1)/(19)$

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