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2 years ago

35% of 20kids are boys.How many boys are there?

Mathematics

2 answers:

lesya [120]2 years ago

8 0

35% of 20 = 35/100 × 20 = 7 boys
pls mark brainliest

Mama L [17]2 years ago

5 0

The answer is 7. 20 times .35 is 7

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Which equation represents an inverse variation function that passes through the points (4, 5) and (10, 2)?

xxTIMURxx [149]

It’s not 5/4x or 20x are there any other options?

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2 years ago

In addition to providing food, what other important functions do plants serve

White raven [17]

They provide us with oxygen, an in return we provide them with carbon dioxide (CO2)

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2 years ago

The function f(x) = 5,000(0.972)X, where x is the time in years, models a declining

lilavasa [31]

Answer:

19440

Step-by-step explanation:

f(x) = 5000(0.972)x

[x = time in years; therefore, substitute x with the given value]

["... how many lemmings will there be in 4 years?]

f(x) = 5000(0.972)4

f(x) = 19440

4 0

1 year ago

which of the following expresses the coordinates of the foci of the conic section shown below? (x-2)^2/4+(y+5)^2/9

elena55 [62]

Step-by-step explanation:

$\frac{(x - 2) {}^{2} }{4} + \frac{(y + 5) {}^{2} }{9} = 1$

This is the equation of the ellipse. Since the denominator is greater for the y values, we have a vertical ellipse. Remember a>b, so a

The formula for the foci of the vertical ellipse is

(h,k+c) and (h,k-c).

where c is

Our center (h,k) is (2, -5)

${c}^{2} = {a}^{2} - {b}^{2}$

Here a^2 is 9, b^2 is 4.

${c}^{2} = 9 - 4$

${c}^{2} = 5$

$c = \sqrt{5}$

So our foci is

$(2, - 5 + \sqrt{5} )$

and

$(2, - 5 - \sqrt{5} )$

6 0

1 year ago

PLEAAAASSSSSE HELP ME WOTH THIS QUESTION!!! I WILL BE MARKING FOR BRAINLIEST ANSWER!!!

monitta

5u^4 + 16u^3 - 15u^2 + 8u + 16 / u + 4

Solution = 5u^3 - 4u^2 + u + 4

Steps:

5u^4 + 16u^3 - 15u^2 + 8u + 16 / u + 4

Use the rational Root Theorem:

a/o = 16

a/n = 5

The dividers of a/o: 1, 16, 2, 4, 8

The dividers of a/n: 1, 5

Therefore check the following Rational Numbers:

+/- 1, 16, 2, 4, 8 / 1, 5

- 4 / 1 is a root of thye expression, So Factor out u + 4:

Compute:

5u^4 + 16u^3 - 15u^2 + 8u + 16 / u + 4, to get the rest of the equation: 5u^3 - 4u^2 + u + 4 = ( u + 4) (5u^3 - 4u^2 + u + 4 ) / u + 4

Cancel the Common Fact, you answer u + 4:

Hence, your answer is, 5u^3 - 4u^2 + u + 4

Hope that helps!!!!! : )

4 0

2 years ago