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Ksivusya [100]
3 years ago
12

Can someone help me with 9 and 11 please!

Mathematics
1 answer:
tamaranim1 [39]3 years ago
5 0

22222222222222222222222222222222222222

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In two or more complete sentences, explain how to solve the cube root equation, <img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3
nordsb [41]
Isolate the root expression:

\sqrt[3]{x+1}+2=0\implies\sqrt[3]{x+1}=-2

Take the third power of both sides:

\sqrt[3]{x+1}=-2\implies(\sqrt[3]{x+1})^3=(-2)^3

Simplify:

(\sqrt[3]{x+1})^3=(-2)^3\implies x+1=-8

Isolate and solve for x:

x=-9

Since the cube root function is bijective, we know this won't be an extraneous solution, but it doesn't hurt to verify that this is correct. When x=-9, we have

\sqrt[3]{-9+1}=\sqrt[3]{-8}=\sqrt[3]{(-2)^3}=-2

as required.
5 0
3 years ago
What is the simplified form of each expression? a. (6 + 3)2 − 4 b. 23 + (14 − 4) ÷ 2
liraira [26]

Answer:

a. 14

b. 28

Step-by-step explanation:

a. ex: (6+3)2 - 4 = 9(2) - 4

18 - 4 = <u>14</u>

b. ex: 23 + (14 - 4) / 2

Use PEMDAS

P 1st

10

D over A

5

A

<u>28</u>

<em><u>Hope this helps!</u></em>

5 0
3 years ago
Number 8 pls giving brainlyist
Gekata [30.6K]

Answer:

the option number 4

Step-by-step explanation:

Hi love,

so the first step is to subtract

4/3x+7=-5

4/3x=-5-7

4/3x=-12

6 0
4 years ago
Read 2 more answers
Find the percent.<br> 2% of 2,100 tiles.
wel

Answer:

42

Step-by-step explanation:

Write 2% as

2

100

Since, finding the fraction of a number is same as multiplying the fraction with the number, we have

2

100

of 2100 =

2

100

× 2100

Therefore, the answer is 42

If you are using a calculator, simply enter 2÷100×2100 which will give you 42 as the answer.

7 0
3 years ago
Read 2 more answers
Simplify 5(3x-6)-8(3x-7)<br><br> Can someone explain how to do this in English?
Lunna [17]
Remember the distributive property? It goes like x(a+b)=xa+xb... For example 3(6+7)=(3*6)+(3*7)=39
Same here
5(3x-6)-8(3x-7)
do the thing
(15x-30)-(24x-56)
Take parentheses off.
15x-30-24x+56
//WHY PLUS 56 NOT MINUS?
//because there was a minus sign outside the original parentheses, so the signs inside have to be flipped when the parentheses is taken off
//Let's simplify now
15x-24x-30+56
-9x+26
^^The answer!
5 0
3 years ago
Read 2 more answers
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