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marta [7]
4 years ago
12

Explain how to use the inverse operations to solve for x in the equation x^2=4

Mathematics
2 answers:
aniked [119]4 years ago
5 0
Answer: 2

Step by step explanation: you multiply that number twice so if it was 2 you say 2•2 and that equals 4
olchik [2.2K]4 years ago
3 0
Divide 2 and 4 is 2 so 2•2=4
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So here is the answer. Initially, Ed's toy cars compared to Pete's toy cars was 5:2. So for every 5 cars that Ed has, Pete has 2. Now that Ed gave 30 cars to Pete. So here it goes. The total number of ratio units is 5+2=7, so each will have an equal number if they both have 3.5 ratio units. That is, if Ed transfers to Pete 1.5 ratio units, their car counts will be equal. Thus 1.5 ratio units = 30 cars, or 1 ratio unit = 20 cars. Therefore, this makes <span> 7*20 cars = 140 cars.
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6 0
3 years ago
What is f(g(x)) for x &gt; 5?
mel-nik [20]

Answer:

\large\boxed{B.\ 4x^2-41x+105}

Step-by-step explanation:

f(x)=4x-\sqrt{x}\\\\g(x)=(x-5)^2\\\\f(g(x))\to\text{put}\ x=(x-5)^2\ \text{to}\ f(x):\\\\f(g(x))=f\bigg((x-5)^2\bigg)=4(x-5)^2-\sqrt{(x-5)^2}\\\\\text{use}\\(a-b)^2=a^2-2ab+b^2\\\sqrt{x^2}=|x|\\\\f(g(x)=4(x^2-2(x)(5)+5^2)-|x-5|\\\\x>5,\ \text{therefore}\ x-5>0\to|x-5|=x-5\\\\f(g(x))=4(x^2-10x+25)-(x-5)\\\\\text{use the distributive property:}\ a(b+c)=ab+ac\\\\f(g(x))=(4)(x^2)+(4)(-10x)+(4)(25)-x-(-5)\\\\f(g(x))=4x^2-40x+100-x+5\\\\\text{combine like terms}\\\\f(g(x))=4x^2+(-40x-x)+(100+5)\\\\f(g(x))=4x^2-41x+105

6 0
3 years ago
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Simplify the expression below. (-5 × -4)÷(-3+5)​
ohaa [14]

Answer:

-10

Step-by-step explanation:

7 0
3 years ago
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navik [9.2K]

Hi! :) How are you?

I'm doing well but I would like to hear about you!

4 0
3 years ago
Ann purchased a prepaid phone card for $20. Long distance calls cost 11 cents a minute using this card. Ann used her card only o
inn [45]

Answer:

I believe the answer is 33 minutes.

Step-by-step explanation:

20$-16.37 is 3.63$

.11cents × 33 minutes is 3.63$

4 0
3 years ago
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