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AleksandrR [38]

2 years ago

10

Help me out , please I forgot how to do this mathematics

1 answer:

netineya [11]2 years ago

7 0

Answer:

C

Step-by-step explanation:

sorry if I'm wrong-

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Triangle DEF is shown below.

kobusy [5.1K]

Answer:

I also need this one

Step-by-step explanation:

7 0

2 years ago

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Multiple this complex number (4-3i)^2

slava [35]

Answer is 7-24i tehe

5 0

3 years ago

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Enter your answer and show all the steps that you use to solve this problem in the space provided. Simplify the expression. 5 +

Anettt [7]

Answer:

$\Large\boxed{21}$

Step-by-step explanation:

To solve this problem, first you have to use the order of operations stands for parenthesis, exponents, multiply, divide, add, and subtract from left to right. Remember to use the order of operations stands for "Please Excuse My Dear Aunt Sally."

Do parenthesis first.

$\displaystyle(8-6)=2$

$\displaystyle 5+4\times2^2$

Next, exponent.

$\displaystyle 2^2=2\times2=4$

$\displaystyle 5+4\times4$

Multiply & divide numbers from left to right.

$\displaystyle 4\times4=16$

Finally, add & subtract numbers from left to right.

$\displaystyle 5+16=21$

As a result, the correct answer is 21.

4 0

3 years ago

1. The formula for the volume of a cone is

Andre45 [30]

Answer:

$r=\sqrt{\frac{3V}{\pi\ h}}$

Step-by-step explanation:

The volume of cone is given by:

$V=\frac{1}{3}\pi\ r^2\ h$

where $r$ is the radius of the base and $h$ is the height of the cone.

We need to solve for $r$

we have $V=\frac{1}{3}\ \pi\ r^2\ h$

Multiplying both sides by 3 to remove $\frac{1}{3}$

⇒ $3\times V=3\times \frac{1}{3}\ \pi\ r^2\ h$

⇒ $3V=\pi\ r^2\ h$

dividing both sides by $\pi\ h$

⇒ $\frac{3V}{\pi\ h}=\frac{\pi r^2 h}{\pi\ h}$

⇒ $\frac{3V}{\pi\ h}=r^2$

Taking square root both sides:

⇒ $\sqrt{\frac{3V}{\pi\ h}}=\sqrt{r^2}$

⇒ $\sqrt{\frac{3V}{\pi\ h}}=r$

∴ $r=\sqrt{\frac{3V}{\pi\ h}}$

3 0

3 years ago

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El señor Joaquín necesita 20 galones de pintura para pintar una casa .Si cada cubeta tiene 20 litros ¿Cuántas cubetas necesita?

bogdanovich [222]

40 is the answer i think because you speak spanish

3 0

3 years ago