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3 years ago

Solve for r write the answer in simplified form 7 = - 7r

Mathematics

1 answer:

alex41 [277]3 years ago

3 0

Answer:

r = -1

Step-by-step explanation:

To get r isolated, you have to divide each side by -7

7 divided by -7 is -1, therefore r = -1

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X=x property of equality

Mekhanik [1.2K]

Answer:

Reflexive Property

Step-by-step explanation:

For all real numbers x , x=x . A number equals itself

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3 years ago

On a sunny day, a 4-foot red kangaroo casts a shadow that is 5 feet long. The shadow of a nearby

son4ous [18]

Answer:

16 feet

Step-by-step explanation:

Set up a proportion where x is the height of the tree:

$\frac{4}{5}$ = $\frac{x}{20}$

Cross multiply and solve for x:

5x = 80

x = 16

So, the tree is 16 feet tall

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3 years ago

What is an equation of a line,in point-slope from, that passes through (1, -7) and has a slope of -2/3

il63 [147K]

Answer:

y + 7 = - $\frac{2}{3}$ (x - 1)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

Where m is the slope and (a, b) a point on the line

Here m = - $\frac{2}{3}$ and (a, b) = (1, - 7), thus

y - (- 7) = - $\frac{2}{3}$ (x - 1), that is

y + 7 = - $\frac{2}{3}$ (x - 1) ← in point- slope form

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3 years ago

If 50% of a number is 150 and 30% of the same number is 90, find 80% of that number.

Alexandra [31]

Answer:

240

Step-by-step explanation:

We know that 50% of the number is 150 so we can assume the number is 300(if its 50% just double that number). Next we use the equation 0.80 x 300 which gives us the answer 240.

Hope I helped

4 0

3 years ago

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What is 125% of 144?

Monica [59]

Answer:

180

hope this helps :)

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2 years ago

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