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4 years ago

9

3∙(a+x), if a=8; x=−10

1 answer:

Oksi-84 [34.3K]4 years ago

6 0

Your answer should be -6

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owen found harry potter books for $12.38 each. he would like to buy one for each of his 4 friends. how much will he spend?

Liono4ka [1.6K]

Answer:

$49.52

Step-by-step explanation:

$12.38 x 4 = 49.52

6 0

3 years ago

Solve x^2+5x=-6 please solve this using quadratics

rodikova [14]

x2 + 5x + 6 = 0

(x + 2)(x + 3) = 0

x = -2 or -3

6 0

3 years ago

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Is the function negative over (-6,-2)

MakcuM [25]

Yes, the function would be negative

5 0

3 years ago

The sum of the radius of the base and the height of a solid cylinder is 37m. If the total surface area of the cylinder is 1628 m

MA_775_DIABLO [31]

Answer:

4618.14 $m^{3}$ or 4618 $m^{3}$

Step-by-step explanation:

From T.S.A = 2 $\pi$ rh + 2 $\pi$ $r^{2}$

where T.S.A = 1628 $m^{2}$

1628 = 2 $\pi$ rh + 2 $\pi$ $r^{2}$

1628 = ( rh + $r^{2}$ ) 2 $\pi$

by dividing both side by 2 $\pi$

$\frac{1628}{2\pi }$ = rh + $r^{2}$

259.10 = rh + $r^{2}$

rh = 259.10 - $r^{2}$

h = $\frac{259.10 - r^{2} }{r}$ <u> </u>(1)

From Radius + Height = 37

r + h = 37 <u> </u>(2)

by substituting eqn 1 into 2

r + $\frac{259.10 - r^{2} }{r}$ = 37

by multiplying r to both side

$r^{2}$ + 259.10 - $r^{2}$ = 37r

259.10 = 37r

r = $\frac{259.10}{37}$

r = 7.00 ≅ 7

From Eqn 2

r + h = 37

7 + h = 37

h = 37 - 7

h = 30

so Volume of a cylinder = $\pi r^{2} h$

V = $\pi$ * $7^{2}$ * 30

V = 4618.14 $m^{3}$ ≅ 4618 $m^{3}$

4 0

4 years ago

Read 2 more answers

A. x=17<br>b. x=13<br>c. x=119<br>d. x=169

seropon [69]

Answer:

the answer is: $x=13$

Step-by-step explanation:

We get the answer using Pitagoras.

$5^2+12^2=x^2$

so

$x=\sqrt{5^2+12^2}=\sqrt{25+144}=\sqrt{169}=13$

6 0

3 years ago

Read 2 more answers