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3 years ago

Using equivalent ratios to find a whole \/

Mathematics

1 answer:

Shkiper50 [21]3 years ago

5 0

Answer:

Step-by-step explanation:

So there are 20 kids with brown hair and this represents 80% of the class total.

So this means 20=.8n since we don't know the total number of kids.

20=.8n

Divide both sides by .8

25=n

So 25 is the total number of kids.

C. is the answer

You could also setup this equation given that 80% is 80/100:

[tex]\frac{20}{\text{ total }}=\frac{80}{100}

To figure out what that total is there you can divide top and bottom of the fraction on right hand side by 4 which gives you the 20 on top and the 25 on bottom.

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How are the coordinates of the extreme value and the equation from part B in the form y=(x-h)^2-c related.

True [87]

The extreme value of y = (x - h)² - c is the vertex of the equation.

<h3>What are extreme values of a function?</h3>

The extreme values of a function are either the maximum or minimum values of the function.

<h3>The equation of a parabola in vertex form</h3>

The equation of a parabola in vertex form with vertex (h', k) is given by

y = a(x - h')² + k and its extreme values are

if a > 0 (h', k) is a minimum point and
if a < 0 (h', k) is a maximum point.

Since y = (x - h)² - c is the equation of a parabola in vertex form, comparing with y = a(x - h')² + k,

h = h'
-c = k and
a = 1.

So, the cooordinates of the vertex of y = (x - h)² - c is (h, -c).

Now, since a = 1 > 0, (h, -c) is a minimum point.

So, the extreme value of y = (x - h)² - c is the vertex of the equation.

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2 years ago

Find the surface area

Nuetrik [128]

Answer:

of what? put pic again can't see it.

Step-by-step explanation:

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3 years ago

Use inverse operations to solve each equation. Explain each step and identify the property used to reach each step.

maks197457 [2]

Hello,

The inverse operation's are easy.

is would be h/3-8=19

Hope this helps

5 0

3 years ago

Read 2 more answers

D'Naisa mixed her favorite shade of orange paint. She had 111 gallon of orange paint and added 222 quarts of yellow paint and 33

natka813 [3]

Answer:

7.5 Quarts

Step-by-step explanation:

D'Naisa mixed the following:

1 gallon of orange paint
2 quarts of yellow paint
3 pints of red paint.

We are to determine in total, the number of quarts of paint that she mixed. this is done by converting each of the volume to quart.

<u>1 gallon of orange paint</u>

1 gallon = 4 Quarts
Orange Paint=4 Quarts

<u>3 pints of red paint.</u>

1 pint =0.5 quart
3 Pints =3 X 0.5 Quart
=1.5 Quart of red paint

Therefore,

Total Volume of Paint Mixed in quart= Volume of Orange+Yellow+Red

=4+2+1.5

=7.5 Quarts

3 0

3 years ago

Read 2 more answers

A local hospital currently has 184 male patients. If the ratio of male to female patients is 4:3, how many female patients are t

Afina-wow [57]

There are 138 female patients in the hospital.

<h3>Solving word problems involving ratios.</h3>

The solution to the word problem involving ratios in the given problem can be determined as follows.

From the given information:

The total number of people in the hospital = male + female

= 184 + x(unknown)

If the ratio of male to female is 4: 3.
The total ratio is 4+3 = 7

The ratio of males in the hospital is:

$\mathbf{184= \dfrac{4}{7} \times x }$

$\mathbf{184\times 7= 4 x }$

x = 322

The number of female patients in the hospital can now be computed as:

$\mathbf{=\dfrac{3}{7}\times 322}$

= 138 female patients

Check:

The total number of people in the hospital is:

= 184 + 138

= 322 patients

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1 year ago