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Brut [27]
2 years ago
14

Help me please it is math

Mathematics
1 answer:
777dan777 [17]2 years ago
6 0
The formula for volume of a cylinder is : V = PI x r^2 x H

for both questions, plug in the known information and solve for the unknown:

Q1)  V = 450, H = 8
  so 450 = 3.14 x r^2 x 8
        450 = r^2 x 25.12
 r^2 = 450 / 25.12 = 17.914
r = sqrt(17.914) = 4.23  rounded to nearest tenth = 4.2 inches

Q2) V = 500, r=6
  
 500 = 3.14 x 6^2 x H
500 = 3.14 x 36 x h
500 = 113.04 x h

h = 500 / 113.047 = 4.42 = 4.4 inches

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Find the slope of the line passing through each of the following pairs of points. (5, 7), (−6, −3)
madam [21]

(5, 7), (−6, −3)

Slope = change in y /change in x

M= -3-7/-6-5

M= -10/-11

M= 10/11


Slope is 10/11

6 0
3 years ago
First to get it right gets brainliest
IRINA_888 [86]

Answer:

hit me with the question

Step-by-step explanation:

5 0
2 years ago
Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours. Together the
Aneli [31]

Answer:

The rate charged per hour by each mechanic are $115 per hour and $65 per hour

Step-by-step explanation:

Let x be the rate charged per hour by first mechanic

Let y be the rate charged per hour by second mechanic

Cost for first worker working for 20 hours = 20x

Cost for second worker working for 15 hours = 15y

We are given that . Together they charged a total of $3275.

So, 20x+15y=3275  -----1

We are also given that the sum of the two rates was $180 per hour

So, x+y=180   ----2

Substitute the value of x form 2 in 1

20(180-y)+15y=3275

y=65

Substitute the value of y in 2

x+65=180

x=180-65

x=115

Hence the rate charged per hour by each mechanic are $115 per hour and $65 per hour

4 0
3 years ago
HELPPPPPP PLSSS AH????
yaroslaw [1]

Answer:

y=-1x-6

Step-by-step explanation:

found slope, which is -1

y+5=-1(x+1)

y+5=-1x-1

y=-1x-6

4 0
3 years ago
Read 2 more answers
A sporting goods store purchased a snowboard and marked it up 25% from the original cost of $120. Then, wanting to make room for
Margaret [11]

The price after the discount was $45.

When the sporting goods store bought the snowboard and marked it up by 25%, the price became:

<em>= Original cost x ( 1 + markup percentage)</em>

= 120 x ( 1 + 25%)

= 120 x 1.25

= $150

The snowboard was then discounted by 70%, the new price becomes:

<em>= Current price x ( 1 - discount rate)</em>

= 150 x ( 1 - 70%)

= 150 x 30%

= $45

In conclusion, the price after the discount was $45.

<em>Find out more at brainly.com/question/1472521.</em>

3 0
2 years ago
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