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andrezito [222]
3 years ago
14

HELP PLEASEEE!!!!! SCHOOL START TOMORROW. NUMBER 21 and 22 ONLY

Mathematics
1 answer:
Snezhnost [94]3 years ago
4 0

Answer:

21. \sqrt{\frac{-s}{15} }

22. 87.92

Step-by-step explanation:

21. The quotient means division is going to happen between -s and 15.  And then take the square root of that.

\sqrt{\frac{-s}{15} }

22. The equation for the volume of a cylinder is this:

\pi r^{2} h

The question gives you values for r, and h, so just substitute those values into the equation.

Here is the work:

\pi r^{2} h\\\\=\pi 2^{2} (7)\\\\=\pi(4)(7)\\\\=\pi (28)

They told us to use 3.14 for pi, so i will substitute pi with 3.14

\pi (28)\\\\=3.14(28)\\\\=87.92

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Plz help me plzzzzz asap
Varvara68 [4.7K]

Answer:

2 \frac{2}{9}

Step-by-step explanation:

First, we will turn 5 2/5 into an improper fraction:

5 * 5 = 25 + 2 = 27/5

So they worked for 27/5 days.

We want to divide the days worked by the distance to get the unit rate of distance per day:

\frac{12}{\frac{27}{5} } = \frac{12}{1} * \frac{5}{27}=\frac{60}{27}=\frac{20}{9}

So our answer is 2 \frac{2}{9}

      Hope this helps, have a great day! :D

6 0
2 years ago
Question 1<br> Solve: 25.6 - 5y + 15. 3
QveST [7]

Answer:

40.9 - 5y

Step-by-step explanation:

25.6 - 5y + 15.3

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8 0
3 years ago
How much does 3.25m of lace cost if 0.8m costs $5.60?
lidiya [134]

Answer:

Step-by-step explanation:

3.25/.8=4.0625

multiply that by 5.6

$22.75 is your answer

8 0
3 years ago
Factor and find the zeros of the relation.
Nady [450]

Answer:

Step-by-step explanation:

c.

y= 30x² +44x +16

factor

y= 2 (15x² +22x +8)

find zeros

15x²+22x+8=0

ax²+bx+c=0

x= (-b±√(b²-4ac))/2a

x= -22±√484-480/30 = -22±2/30 = -11±1/15

there are 2 zeros x= -10/15 ; x= -12/15

d.

y= 10x² +60x +80

factor

y= 10(x²+6x+8) = 10( x+2)(x+4)

finding zeros

x+2 =0 so x= -2

x+4 =0 so x= -4

there are 2 zeros x= -2; x= -4

4 0
3 years ago
Me ayudan plis es para hoy ​
sladkih [1.3K]

Answer:

si yo te ayudo pero no puedo ver bien la foto

6 0
3 years ago
Read 2 more answers
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