3(8+7) = and how to solve it

2 answers:

fomenos2 years ago

7 0

Answer: 45

Use PEMDAS

first do what in the parentheses

(8+7)

8 + 7 = 15

Now we have

3(15)

This is multiplication

3 x 15 = 45

USPshnik [31]2 years ago

5 0

Hello there! :)

3(8+7)

First, do the operation inside the parentheses:

3(15)

Multiply:

Let's try another way. Use the Distributive Property to distribute 3:

24+21=45

So the answer is 45. Hope this helps you! :)

~Just a joyful teen

$SilentNature$

You might be interested in

If the heights of 300 students are normally distributed with mean 68.0 inches and standard deviation 3.0 inches, how many studen

Lunna [17]

Given:
μ = 68 in, population mean
σ = 3 in, population standard deviation

Calculate z-scores for the following random variable and determine their probabilities from standard tables.

x = 72 in:
z = (x-μ)/σ = (72-68)/3 = 1.333
P(x) = 0.9088

x = 64 in:
z = (64 -38)/3 = -1.333
P(x) = 0.0912

x = 65 in
z = (65 - 68)/3 = -1
P(x) = 0.1587

x = 71:
z = (71-68)/3 = 1
P(x) = 0.8413

Part (a)
For x > 72 in, obtain
300 - 300*0.9088 = 27.36

Answer: 27

Part (b)
For x ≤ 64 in, obtain
300*0.0912 = 27.36

Answer: 27

Part (c)
For 65 ≤ x ≤ 71, obtain
300*(0.8413 - 0.1587) = 204.78

Answer: 204

Part (d)
For x = 68 in, obtain
z = 0
P(x) = 0.5
The number of students is
300*0.5 = 150

Answer: 150

3 0

3 years ago

4x-3(x-2)-x I have 6. Is that correct? 4x-3x-x=0 And -3*-2=6 0+6=6

sesenic [268]

4x - 3(x - 2) - x
4x - 3x + 6 - x
4x - 4x + 6
6....u r correct because ur x's cancel out

8 0

3 years ago

Simplify. 4/x^2-35 - 1/x+5

Oksana_A [137]

If I understand your question well, I suppose you mean $\frac{4}{ x^{2} -35} - \frac{1}{x+5}$
$\frac{4}{ x^{2} -35} - \frac{1}{x+5} = \frac{4}{(x+5)(x-7)}- \frac{1}{x+5} \\ = \frac{1}{x+5}( \frac{4}{x-7}-1) \\ = \frac{1}{x+5}( \frac{4}{x-7}- \frac{x-7}{x-7}) \\ = \frac{1}{x+5}( \frac{4-x+7}{x-7}) \\ = \frac{1}{x+5}( \frac{11-x}{x-7}) \\ = \frac{11-x}{ x^{2} -35}$

6 0

3 years ago

Add (–3.5x + 1.7) + (9.1x - 0.3)=

topjm [15]

-3.5x + 9.1x + 1.7 - 0.3 = 5.6x + 1.4

5 0

3 years ago

Read 2 more answers

What is the solution to the system of equations?

lord [1]

Answer:

We are sorry, but you do not have access to this service. Please contact your Organization Administrator for access.

5 0

2 years ago