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2 years ago

5

-2x+1=7 how do I do this?

2 answers:

Agata [3.3K]2 years ago

7 0

Answer:

-3

Step-by-step explanation:

Write the equation down, the first step is to minus the one from both sides of the equal sign(since it’s the opposite then adding) so you cancel out the 1 and do 7-1 your equation would look like this : -2x=6 the next step is to divide the -2 (it’s the opposite of multiplication) your answer would be x=-3

ivanzaharov [21]2 years ago

5 0

Answer: x=-3

Step-by-step explanation: -2x+1=7

-2x=7-1

-2x=6

-2x/-2=6/-2

X=-3

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2 years ago

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2 years ago

Prove divisibility 45^45·15^15 by 75^30

Anuta_ua [19.1K]

Answer:

$3^{75}$

Step-by-step explanation:

We are asked to divide our given fraction: $\frac{45^{45}*15^{15}}{75^{30}}$ .

We will simplify our division problem using rules of exponents.

Using product rule of exponents $(a*b)^n=a^n*b^n$ we can write:

$45^{45}=(3*15)^{45}=3^{45}*15^{45}$

$75^{30}=(5*15)^{30}=5^{30}*15^{30}$

Substituting these values in our division problem we will get,

$\frac{3^{45}*15^{45}*15^{15}}{5^{30}*15^{30}}$

Using power rule of exponents $a^m*a^n=a^{m+n}$ we will get,

$\frac{3^{45}*15^{45+15}}{5^{30}*15^{30}}$

$\frac{3^{45}*15^{60}}{5^{30}*15^{30}}$

Using quotient rule of exponent $\frac{a^m}{a^n}=a^{m-n}$ we will get,

$\frac{3^{45}*15^{60-30}}{5^{30}}$

$\frac{3^{45}*15^{30}}{5^{30}}$

Using product rule of exponents $(a*b)^n=a^n*b^n$ we will get,

$\frac{3^{45}*(3*5)^{30}}{5^{30}}$

$\frac{3^{45}*3^{30}*5^{30}}{5^{30}}$

Upon canceling out $5^{30}$ we will get,

$3^{45}*3^{30}$

Using power rule of exponents $a^m*a^n=a^{m+n}$ we will get,

$3^{45+30}$

$3^{75}$

Therefore, our resulting quotient will be $3^{75}$ .

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3 years ago

What’s 7^4 simplified <br><br><br> 24 POINTS HELP QUICK AA

Blababa [14]

Answer:

2401

Step-by-step explanation:

because 7*7*7*7=2401

4 0

2 years ago

Read 2 more answers

Help with hw please I’ll give brainliest

Ymorist [56]

The first one is B
The second one is D
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2 years ago