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iVinArrow [24]
2 years ago
9

Eq 1 X+Y=16 Eq 2 6x+9y=120 Solve by substitution Solve step by step

Mathematics
1 answer:
Alexxx [7]2 years ago
7 0

Answer:

X = 8, Y = 8

Step-by-step explanation:

Step 1) Solve for Y w/ bottom equation to yield - y = -2/3x + 40/3.

Step 2) substitute equation into x + y = 16 to get 1/3x + 40/3 = 16 multiply by 3 to clear the fractions and get x + 40 = 48 - subtract 40 by both sides to get x = 8.

Step 3) Plug x = 8 into the bottom equation to get 48 + 9y = 120, subtract 48 by both sides to get 9y = 72 and then divide by 9. The product is y = 8.

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C = cheese

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and $ 48 was spent

so ur equation would be : c + 0.5c + 4c = 48 <=

3 0
3 years ago
In 3 years, Dianna will be 4 times as old as she was 33 years ago. How old is Dianna now?
Sergeu [11.5K]

Given that In 3 years, Dianna will be 4 times as old as she was 33 years ago, her present age is 45.

<h3>How old is Dianna now?</h3>

Given that, in 3 years, Dianna will be 4 times as old as she was 33 years ago.

Let x represent the age of Dianna presently.

Dianna's age in 3 years time will be: x + 3

Dianna's age 33 years ago is: x - 33

Since in 3 years, she will be 4 times as old as she was 33 years ago.

x + 3 = 4( x - 33 )

We solve for x

x + 3 = 4x - 132

3 + 132 = 4x - x

135 = 3x

x = 135/3

x = 45

Given that In 3 years, Dianna will be 4 times as old as she was 33 years ago, her present age is 45.

Learn more word problems here: brainly.com/question/2610134

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4 0
2 years ago
The height of an ostrich is 20 inches more than 4 times the height of kiwi write and solve an equation to find the height of kiw
seropon [69]
The answer is 80 I think
3 0
4 years ago
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American households increasingly rely on cell phones as their exclusive telephone service. It is reported that 50.4% of American
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The variance of the binomial distribution of the number of households with landline service is 2.

<h3>What is the binomial probability distribution?</h3>

It is the probability of <u>exactly x successes on n repeated trials, with p probability</u> of a success on each trial.

The variance of the distribution is given by:

V(X) = np(1 - p)

In this problem, the parameters are given as follows:

n = 8, p = 0.504.

Hence the variance is given by:

V(X) = 8 x 0.504 x 0.496 = 2.

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5 0
2 years ago
What is the first step in solving for zin equation 5z - 4 = 26
aksik [14]

Answer:

add 4 on both sides

Step-by-step explanation:

7 0
3 years ago
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