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3 years ago

PLSSS HELPPPPPPP ASAPPPP I NEED THIS

Mathematics

1 answer:

krek1111 [17]3 years ago

4 0

True because u could divide the number of cubes on the top, front, and left to get how many are in the structure

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Find the number to add to x^2-18x

pentagon [3]

Answer:

A. add 81; $(x-9)^2$

Step-by-step explanation:

The perfect square formula

$(a-b)^2=a^2-2ab+b^2$

Rewrite expression $x^2-18x$ as follows:

$x^2-2\cdot 9\cdot x$

So, to form a perfect square, $+9^2$ is missed.

When we add $9^2=81,$ we will get

$x^2-2\cdot 9\cdot x+9^2=(x-9)^2$

4 0

3 years ago

Calculate the volume of the composite shape please please help giving brainliest!!

Ilya [14]

${\qquad\qquad\huge\underline{{\sf Answer}}}$

There are two hemispheres in there with radius 3 cm, so we can consider it as a whole one. and the other shape in between is Cylinder with radius 3 cm and height 4 cm.

Volume of whole ahape = volume of Cylinder + volume of sphere ~

Volume of sphere :

$\qquad \sf \dashrightarrow \: \cfrac{4}{3} \pi {r}^{3}$

$\qquad \sf \dashrightarrow \: \cfrac{4}{3} \sdot3.14 \sdot {(3)}^{3}$

$\qquad \sf \dashrightarrow \: (4 )\sdot(3.14) \sdot(9)$

$\qquad \sf \dashrightarrow \: 113.04 \: \: cm {}^{3}$

Volume of Cylinder :

$\qquad \sf \dashrightarrow \: \pi {r}^{2} h$

$\qquad \sf \dashrightarrow \: 3.14 \cdot(3) {}^{2} \sdot4$

$\qquad \sf \dashrightarrow \: 3.14 \sdot(9) \sdot(4)$

$\qquad \sf \dashrightarrow \: 113.04 \: \: cm {}^{3}$

Volume of whole shape :

$\qquad \sf \dashrightarrow \: 113.04 + 113.04 = 226.08 \: \: cm {}^{3}$

$\qquad \sf \dashrightarrow \: 226.08 \: \: cm {}^{3}$

8 0

2 years ago

3 3/8 divided by 2 1/4 =

denpristay [2]

Answer:

1.5 or 1/5

Step-by-step explanation:

Dividing two fractions is the same as multiplying the first fraction by the reciprocal of the second fraction. The first step to dividing fractions is to find the reciprocal (reverse the numerator and denominator) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators.

6 0

3 years ago

If h(x) is the inverse of f(x), what is the value of h(f(x))? оо 0 1 ООО o f(x)

mart [117]

Answer:

Step-by-step explanation:

If h(x) is the inverse of f(x) them h(f(x)) = x.

7 0

4 years ago

In the figure, m and n are rays.

Fiesta28 [93]

I think it's a b not sure about the rest though

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3 years ago