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3 years ago

7th Grade Math Please help I will give brainliest!! 19 = 5/3 r Find the value of r

Mathematics

1 answer:

Scilla [17]3 years ago

8 0

Answer:

$\huge\boxed{r=\dfrac{57}{5}\to r=11\dfrac{2}{5}\to r=11.4}$

Step-by-step explanation:

$19=\dfrac{5}{3}r\to\dfrac{5}{3}r=19\qquad|\text{multiply both sides by 3}\\\\3\!\!\!\!\diagup\cdot\dfrac{5}{3\!\!\!\!\diagup}r=19\cdot3\\\\5r=57\qquad|\text{divide both sides by 5}\\\\\dfrac{5r}{5}=\dfrac{57}{5}\\\\r=\dfrac{57}{5}\to r=11\dfrac{2}{5}\to r=11.4$

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Complete each question by choosing or typing in the best answer. To receive the highest score, be sure to leave nothing blank. W

Stells [14]

Answer:

The correct option is C) 36

Step-by-step explanation:

Consider the provided table:

x - y

1 - 1

2 - 4

3 - 9

4 - 16

Observe the pattern:

If we square the x value we can find the corresponding y value.

For example

2² = 4

Where 2 is x value and 4 is corresponding y value, similarly

3² = 9

4² = 16

Now we need to find the y value when x=6.

To find this simply square the x value that will gives us the corresponding y value.

6² = 36

Hence, the correct option is C) 36

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3 years ago

Which expression is equivalent to (4mn/m^-2n^6)^-2

Illusion [34]

First, we get rid of the negative exponent in the parenthesis. We do this by moving it to the top. Our equation is now:

$( \frac{4m^3n}{n^6})^{-2}$

Next, we can cross out one n from both the top and the bottom.

$(\frac{4m^3}{n^5} )^{-2}$

Finally, we evaluate the -2

Our equation becomes:

$\frac{ (4*m^3)^{-2} }{(n^5) ^{-2} }$

This becomes: $\frac{(n^5)^2}{(4*m^3)^2} = \frac{ n^{10} }{16*m^6}$

This can not be simplified any further, so this is the final answer.

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3 years ago

What is the sum? (3x+2)+(2x)+(2x+1)+(5x-2)

Tanya [424]

You can use mathpapa.com algebra calculator

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3 years ago

PLEASE HELP :) LOTS OF POINTS + BRAINLY

pogonyaev

Jackson's method to figure out the height of the mountain is from the

similar triangles formed by the light using the mirror.

Response:

The height of the mountain is <u>50 feet 8 inches</u>

<h3>Which methods can used to find the height of the mountain?</h3>

The given parameters are;

Distance of the mirror from Jackson = 5 feet

Distance of the mirror from the base of the mountain = 40 feet

Height of Jackson = 6'4'' tall

Required:

The approximate height of the mountain, <em>h</em>

Solution:

The triangles formed by the light from the top of the mountain which is

reflected to Jackson from the mirror, Jackson's height, the height of the

mountain, and their distances from the mirror, are similar triangles.

The ratio of corresponding sides of similar triangles are equal, therefore,

we have;

$\dfrac{Jackson's \ height}{Jackson's \ distance \ from \ the \ mirror } =\mathbf{ \dfrac{Height \ of \ the \ mountain}{Distance \ of \ the \ mountain \ from \ the \ mirror}}$