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3 years ago

Use the elimination method to solve the system of equations.

Mathematics

2 answers:

AnnZ [28]3 years ago

6 0

The answer is A.
x= 3/5 or 0.6 and y= 2

Alborosie3 years ago

5 0

5x + 2y = 7
+
−5x + 4y = 5
____________

6y = 12
y = 12/6
y = 2

5x + 2y = 7
5x + 2*2 = 7
5x + 4 = 7
5x = 7 - 4
5x = 3
x = 3/5

A. ( 3/5, 2)

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katelyn has taken 4 math quizzes. Her scores were 75,80,97, and 92. What must she get on her next quiz to have an average of at

Vilka [71]

To find the average add all the numbers together then divide by how many numbers there are.

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3 years ago

Can y'all please help.

sattari [20]

Answer:

See explanation

Step-by-step explanation:

Step 1. Substitute for d to solve for n:

From the first equation:

$d=70-n$

Then substitute it into the second equation:

$0.1(70-n)+0.05n=5.5\\ \\7-0.1n+0.05n=5.5\\ \\7+(-0.05n)=5.5\\ \\-0.05n=5.5-7=-1.5\\ \\n=\dfrac{-1.5}{-0.05}=30$

Step 2: Substitute for n to solve for d:

$d+n=70\\ \\d+30=70\\ \\d=70-30=40$

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3 years ago

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Nuetrik [128]

Answer:

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Step-by-step explanation:

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2 years ago

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Salsk061 [2.6K]

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So b. is the correct answer as;

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Reil [10]

Answer:

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Step-by-step explanation:

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2 years ago