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NARA [144]
4 years ago
6

It takes 40 minutes for eight people to paint four walls how many minutes does it takes 10 people to paint seven walls

Mathematics
1 answer:
sasho [114]4 years ago
8 0
8r(40)=4

r=1/80  that is the rate for each person...

10rt=7  using r we found before

10(1/80)t=7

t/8=7

t=56 minutes.
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Find the slope given the points (-5,-3) and (2,4)
Setler79 [48]

Answer:

The slope of the line is 1.

Step-by-step explanation:

We are given two coordinate points:

  • (-5, -3)
  • (2, 4)

We can use the rate of change formula to find the slope of the points.

  • \displaystyle \frac{\triangle y}{\triangle x}

In mathematics, coordinate pairs are labeled as:

(x_1, y_1) \ \text{and} \ (x_2, y_2)

Therefore, we can relabel our points:

  • x_1 = -5
  • y_1 = -3
  • x_2 = 2
  • y_2 = 4

After we do this, we can expand the rate of change formula:

\displaystyle m = \frac{y_2-y_1}{x_2-x_1}

Now, we can use simple substitution to solve for m, or the slope.

\displaystyle m = \frac{y_2-y_1}{x_2-x_1}\\\\m = \frac{4-(-3)}{2-(-5)}\\\\m = \frac{7}{7}\\\\m = 1

Therefore, the slope of the line is 1.

8 0
3 years ago
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Ann [662]
C. 18 hours of my sleep I
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Let p: x &lt; −3
Serhud [2]

Answer:

B. x > 3 or x < −3

Step-by-step explanation:

We are given that,

p: x < −3

q: x > 3

Since, we know that,

The symbol v is known as 'disjunction', which is in other words represented by 'union', 'or'.

Thus, 'p ∨ q' means 'either p holds or q holds'.

Hence, we get,

'p ∨ q' is represented by 'either x <-3 or x > 3'.

i.e. 'p ∨ q' is represented by 'either x > 3 or x <-3'.

Thus, option B is correct.

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Step-by-step explanation:

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3 years ago
What is the unit rate for 12 pounds into $5.79
valentina_108 [34]

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$5.79 / 12 pounds = 48.25 cents per pound

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