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3 years ago

Pls help!!!!! Thx and fast sry for rushing!!

Mathematics

2 answers:

Alenkasestr [34]3 years ago

8 0

The answer is 399

PEMDAS

First is parenthesis, 20 - 8 = 12

Then exponents, 4^3 = 64

Since the 12 is still in parenthesis, you multiply it by the 64 and you get 768.

Moving onto the D in PEMDAS, you have to divide the 768 by 2 and you get 384.

And finally, addition. 384 + 6 = 390 and 390 + 9 = 399.

Oxana [17]3 years ago

4 0

the answer is 399 just go to socratic if you need help with math.

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Solve 4sin^2 x-3=0 find two values of sinx that satisfy this equation

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3 years ago

What expression is equivalent to 2.2-2.5?

Pani-rosa [81]

Hi Camrynb10705oxknsv!
So let's take a look at the answers they give. A is 2.5 - 2.2 and all that is is switching the numbers so that isn't right. B they do addition instead of subtraction so that can't be right. C they do 2.2 + (-2.5) and when you add a negative number it's like subtraction because a negative number is under 0 and so your adding a number under 0 so you go down. So the answer is C.
If you need me to explain it different let me know. Hope this helps!

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3 years ago

Read 2 more answers

The sum of a number 8 and twice the number X is 28

hichkok12 [17]

ANSWERS ARE AT THE BOTTOM

To solve this question, we need to write the questions algebraically. Let's look at the problem first: The sum of a number 8, and twice the number x is equal to 28.

Algebraic form:

8 + 2x = 28

Lets solve this!

8 + 2x = 28 (Algebraic Form)

2x = 28 - 8 (Subtract 8 from both sides)

2x = 20 (Divide by 2)

x = 10 (Answer)

ANSWER:

x = 10

3 0

2 years ago

Please help and explain questions 20-22

zmey [24]

Hello!

The formula for circumference is $2\pi r$ and the formula for area of a circle is $\pi r^{2}$ . Armed with these formulas, we can begin to find the circumferences and areas of the circles.

20.
C = $2 \pi r$
C = $2 \pi (6.5)$
C = $13 \pi$
C = 13(3.14)
C = 40.8

A = $\pi r^{2}$
A = $\pi (6.5)^{2}$
A = $\pi (42.25)$
A = 132.7

The circumference of the circle is 40.8 in and the area of the circle is 132.7 in².

21.
[Since we are given the diameter for this problem, to find the circumference, we no longer need to multiply the radius by 2 as in $2 \pi r$ because the diameter is the radius × 2. For $\pi r^{2}$ we do need to divide the diameter by 2.]

C = $15.7 \pi$
C = 49.3

A = $\pi r^{2}$
A = $\pi (7.85)^{2}$
A = $61.62 \pi$
A = 193.5

The circumference of the circle is 49.3 in and the area of the circle is 193.5 in².

And that is all there is to it. I hope this helps you! (:

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3 years ago

Question 2 Which of these expressions is equal to 4m + 8m?

yKpoI14uk [10]

Answer:

12 m

Step-by-step explanation:

Given the expression : 8m + 4m

The numbers 8m and 4m are bound by the addition operator.

When using the addition operator, the Coefficient are are the values added for like terms.

Since both values given can be like terms based on 'm', the Coefficient of m in each vlaue is added ;

Hence, we have ;

8m + 4m = 12m

3 0

3 years ago