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kogti [31]
2 years ago
12

7th grade math help me pleaseeee

Mathematics
2 answers:
Rainbow [258]2 years ago
7 0

Step-by-step explanation:

volume of cylinder = πr²h

  • 22/7×4²×15. {radius (r)=diameter/2)
  • 754in³

its yr ans.

hope it helps

<h2>stay safe healthy and happy.</h2>
Arisa [49]2 years ago
5 0

Answer:

option 2 : 754 in³

Step-by-step explanation:

diameter = 8 => radius, r = 4 inches , h = 15 inches

volume = \pi r^2 h

          =\pi \times 4^2 \times 15 \\\\=753.9 \ in^3\\\\= 754 \ in^3

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erica [24]

Answer: 1. d. 7x\geq 350; x\geq 50

2. a. (5, 28)

3. a: C(n) = 0.90 n - 0.40

Step-by-step explanation:

1. Here x represents the saving of one day.

Thus, the total saving for 7 day = 7 x

And, my  goal is to save at least $350.00  ( According to the question)

⇒ 7x\geq 350

⇒  x\geq 50 ( by dividing both sides by 7 )

Therefore, Option d is correct.

2. since, if a point satisfies an equation then we can say that it is the solution of the equation.

(5,28) satisfies y= 5x + 3

Because at x = 5, 5×5 + 3 = 25 + 3 = 28

except this point other points (28, 5), (4, 20) and (3, 19) are not satisfying given equation of line.

Therefore, only (5,28) is the solution of line.

⇒ Option a is correct.

3. Here n represents the number of tunas.

And, according to question the cost of one tuna = $0.90

⇒ Cost of n tunas = $ 0.90n

But again according to the question,

I have a coupon for $0.40 off your total purchase.

Thus, $ 0.40 will be less from my total purchasing cost.

⇒ The cost of n tunas = $ (0.90 n - 0.4)

Option a is correct.



7 0
3 years ago
Is (8,8) a solution to the equation y=x?​
Nookie1986 [14]

Answer:

Yes

Step-by-step explanation:

(8,8) is a solution is y=x.

If we substitute the point into the equation, the equation is true.

(8,8) is in (x,y) format

Substitute:

y=x

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LS=RS (left side equal rights side)

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Step-by-step explanation:

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Answer:

25 in

Step-by-step explanation:

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3 years ago
A sprinter can run 279 feet in 9 seconds. Find the sprinter's unit rate of feet per second.
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Easy 31 feet  per second take 279 and divide it by 9 and you get 31

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