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3 years ago

What is 4.5w=5.1w-30 step by step?

Mathematics

1 answer:

MA_775_DIABLO [31]3 years ago

6 0

Correct me if I’m wrong

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What is 4z-3/z+6 when z = −3?

Ierofanga [76]

4(-3)-3/(-3)+6
-12-3/-3+6
-12+1+6
-12+7
-5

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3 years ago

What is the first quartile

azamat

<span>The first quartile (Q1) is defined as the middle number between the smallest number and the median of the data set.</span>

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2 years ago

Yes or No? PLEASE HELP, IM FAILING MATH. NO LINKS!!

GuDViN [60]

Answer:

Step-by-step explanation:

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3 years ago

Which of the following represents the difference between the central angles of the above regular polygons? Round to the nearest

solong [7]

Answer:

its 15.43

Step-by-step explanation:

you didnt put a picture for the polygons but im pretty sure this is from math nation.

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2 years ago

As a first step in solving the system shown, Yumiko multiplies both sides of the equation 2x – 3y = 12 by 6. By what factor shou

GenaCL600 [577]

Answer:

Yumiko should multiply the other equation by 3.

If she adds the two equations she would be left with the variable 'x'.

Step-by-step explanation:

Given the two equations are as follows:

$2x - 3y = 12 \hspace{5mm} \hdots (1)$

$5x + 6y = 18 \hspace{5mm} \hdots (2)$

It is given that she multiplies the first equation by 6. Therefore, (1) becomes

$12x - 18y = 72 \hspace{15mm} \hdots (a)$

Now, note that the sign of the variable 'y' is negative. So, if we make the co-effecient of 'y' equal in both the cases, add them it would result in the elimination of the variable 'y'.

The co-effecient of y in Equation (2) is 6. To make it 18 like it is in Equation (1), we multiply throughout by 3.

Therefore, Equation (2) becomes:

$15x + 18y = 54 \hspace{5mm} \hdots (b)$

Now, we add Equation (a) and Equation (b).

$\implies 12x - 18y + 15x + 18y = 72 + 54$

$\implies 27x = 126$

Factor: 3

Equation: 27x = 126

7 0

2 years ago