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2 years ago

14

Need help for this please

1 answer:

Ksju [112]2 years ago

8 0

Answer:

The area of the circle is approximately <u>154</u> square meters

Step-by-step explanation:

Area of a circle formula: $A = \pi r^{2}$

given:

- diameter = 14m

- pi = 22/7

$radius (r) = diameter/2 = 14/2 = 7\\A = 22/7*(7)^2\\A = 22/7*(49)\\A = 154$

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SOLVING EACH SYSTEM BY ELIMINATION <br><br><br> x+3y=5 x=-6y+14<br><br><br> HELP

nata0808 [166]

Answer:

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$x=-4,\:y=3$

Step-by-step explanation:

Given the system of the equations

$x+3y=5;\:x=-6y+14$

solving by elimination method

$\begin{bmatrix}x+3y=5\\ x=-6y+14\end{bmatrix}$

$\mathrm{Arrange\:equation\:variables\:for\:elimination}$

$\begin{bmatrix}x+3y=5\\ x+6y=14\end{bmatrix}$

$x+6y=14$

$-$

$\underline{x+3y=5}$

$3y=9$

$\begin{bmatrix}x+3y=5\\ 3y=9\end{bmatrix}$

solve $3y=9$ for $y$ :

$3y=9$

$\frac{3y}{3}=\frac{9}{3}$

$y=3$

$\mathrm{For\:}x+3y=5\mathrm{\:plug\:in\:}y=3$

Solve $x+3\cdot \:3=5$ for x:

$x+3\cdot \:3=5$

$x+9=5$

$x=-4$

Therefore,

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$x=-4,\:y=3$

6 0

3 years ago

Given f(x)= -x^2+3x-4 and g(x)=2/3x +5 find f(g(-9))

scZoUnD [109]

Answer:

0

Step-by-step explanation:

First, you plug -9 into g(x) and you get g(-9) = - 1. After that, you solve f(-1), which you then reach the solution of 0 by solving.

6 0

4 years ago

What are three possible products whose factors multiply to -7?

kifflom [539]

-1 x 7

-7 x 1

-3.5 x 2

3.5 x -2

6 0

3 years ago

DeShawn won 95 pieces of gum playing hoops at the county fair. At school he gave four to every student in his math class. If the

Anarel [89]

Answer:

he has 7 pieces left

Step-by-step explanation:

becausebecause if you take 22 and multiply it by 4 and then you get 88 then you take 95 and subtract 88 from 95 and you get seven

5 0

3 years ago

Read 2 more answers

“angle A = 32, AC = 9, BC = x. Find x to two decimal places, don’t forget to round properly based on the third decimal place.” P

Liono4ka [1.6K]

<u>Given</u>:

Given that ABC is a right triangle.

The measure of ∠A is 32°.

The length of AC is 9 units.

The length of BC is x units.

We need to determine the value of x.

<u>Value of x:</u>

The value of x can be determined using the trigonometric ratio.

Thus, we have;

$sin \ \theta=\frac{opp}{hyp}$

where θ = A, the side opposite to A is BC and hypotenuse is AC.

Thus, we have;

$sin \ A=\frac{BC}{AC}$

Substituting BC = x and AC = 9, we get;

$sin \ 32=\frac{x}{9}$

Multiplying both sides by 9, we have;

$sin \ 32 \times 9=x$

$4.77=x$

Thus, the value of x is 4.77 units.

4 0

3 years ago