2 years ago

-5(3-r)=30 Please help!

Mathematics

1 answer:

Andrej [43]2 years ago

3 0

The answer to -5(3-r)=30

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If 6 is added to three quarters of a certain number, the result is 42 . Find the original number

Basile [38]

Answer:

Step-by-step explanation

Hello!

3x/4 + 6=42

3x/4=42-6 = 36

3x = 36*4

3x = 144

x= 144/3 =48

3/4 of 48 = (48*3) / 4 =36

36+6=42

the original number is 48

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2 years ago

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What is the simplest form of this expression?<br> 4(-n-3) + 7

Serga [27]

Answer:

− 4 n − 5

Step-by-step explanation:

Simplify the expression.

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3 years ago

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The algebraic process you use to isolate a variable in order to find what values, numbers, etc. will make an equation true. You

Mnenie [13.5K]

Solve is the certain answer, not "check the equation" silly. Now, I must solve some more problems on Brainly :)

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3 years ago

Can someone please help me

Evgesh-ka [11]

Answer:

UW ≈ 6.55 ≈ 7

Step-by-step explanation:

cos (35) = adjacent/hypotenuse

cos(35) = UW/VW

cos(35) = UW/8

8*cos(35) = UW

UW ≈ 6.55

Hope this helped! <3

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2 years ago

Which is the solution to (8.5 x 103)(2 x 105) expressed in scientific notation?

kenny6666 [7]

We have been given an expression $(8.5\times 10^3)(2\times 10^5)$ . We are asked to find the solution to our given expression expressed as scientific notation.

Let us simplify our given expression.

Using exponent property $a^m\cdot a^n=a^{m+n}$ , we will get:

$8.5\times 2\times 10^3\times 10^5$

$17\times 10^{3+5}$

$17\times 10^{8}$

Now to write our answer in scientific notation, we need our 1st multiple between 1 and 10. So we will rewrite our expression as:

$1.7\times 10\times 10^{8}$

$1.7\times 10^{1+8}$

$1.7\times 10^{9}$

Therefore, our required solution would be $1.7\times 10^{9}$ .

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2 years ago