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Inessa [10]
3 years ago
15

Which expressions are equivalent?

Mathematics
1 answer:
nasty-shy [4]3 years ago
6 0
The first set of expressions bc 3x is equivalent to 3x and -7y is equivalent to -7y
You might be interested in
Which equation is equivalent to (1/3)^x=27^x+2?
ruslelena [56]
Ok so the answer is D because first I solved the equation because you can’t find which answer choice it is equivalent to if you didn’t solve it ... so I solved the equation and got x=-3/2 how I solved this is

3^-x = 3^3x+6 ... since the bases are the same, set the exponents equal
-x=3x+6..... move the variable to the left-hand side and change its side
-x-3x=6 ... collect like terms
-4x = 6..... divide both sides of the equation by -4 and I got x=-3/2
I don’t want this text to be that long so they both seem calculated the same way that’s why i got -3/2 hope that helps;-;
6 0
3 years ago
If there are 48 boys and 64 girls and the teachers decided to put them each in in equal rows only boys or girls will be in each
german

Answer: 16

Step-by-step explanation:

The question seeks to know the largest number of people that can sit in each row.

To answer this, find the Highest Common Factor of the numbers 48 and 64.

Factors of 48 ⇒ 1, 2, 3, 4, 6, 8, 12, 16, 24 and 48

Factors of 64 ⇒ 1, 2, 4, 8, 16, 32 and 64

Because the teacher wants the rows to be equal with either only boys or only girls sitting in them, the highest number of people that can sit in a row will be 16.

There will be 7 rows in total.

Boys ⇒ 48/ 16 = 3 rows

Girls ⇒ 64/16 = 4 rows

5 0
3 years ago
9. Stephanie gets her hair cut every 42 days. Her sister goes to the
Fiesta28 [93]

Answer:

Yes

408 days

Step-by-step explanation:

The LCM is 408

= 408 days

5 0
3 years ago
To raise a power to a power, what must you do to the exponents? A)   add them B)   subtract them C)   multiply them D)   divide 
nadezda [96]
A) multiply them

When you have a power of a power you multiply the powers together
5 0
3 years ago
Solve <br> 4x to the second power<br> Minus 9
alexira [117]

4x^2-9

Here I have included 3 methods: Differentiating, Integrating and factorize

Differentiating:

4x^2-9

2*4x^2^-^1

8x^2^-^1

= 8x

Integrating:

\int\limits 4x^2-9dx

\frac{4x^3}{3}-9x+C

Factorise:

(2x-3)(2x+3)

 

6 0
3 years ago
Read 2 more answers
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