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3 years ago

Solve the system by substitution. y = -7x + 4 10x – 10y = 40

Mathematics

1 answer:

zavuch27 [327]3 years ago

6 0

Answer:

point form

(1,-3)

equation form

x=1 y= -3

Step-by-step explanation:

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Decompose 8/12 in two ways with: <br> x/2 + x/2 = 8/12

LUCKY_DIMON [66]

$\frac{x}{2} + \frac{x}{2} = \frac{8}{12} \\\frac{2x}{2} = \frac{2}{3} \\x = \frac{2}{3}$
or
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3 years ago

Jenya graphed a scatter plot of number of potholes (y) and length of a road in miles (x). She drew the trend line and calculated

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Answer:

Step-by-step explanation:

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3 years ago

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The Ohio Department of Agriculture tested 203 fuel samples across the state in 1999 for accuracy of the reported octane level. F

OlgaM077 [116]

Answer:

The Sample size is 1918.89035

Step-by-step explanation:

Consider the provided information.

It is given that 14 out of 105 samples failed.

Therefore p = 14/105 = 0.13 3... and q=1-0.133=0.867

Samples would be needed to create a 99 percent confidence interval.

Subtract the confidence level from 1, then divide by two.

$\frac{(1 -0.99)}{2}=0.005$

By standard normal table z=2.5758≈2.58

Calculate the sample size as:

$n=\frac{z^2pq}{e^2}$

Where, e is the margin of error,

Substitute the respective values.

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3 years ago

What is the value of (-1/3)3?

Marysya12 [62]

Answer: 3

Step-by-step explanation:

(-1÷3)3=3

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3 years ago

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What's the equation for "ten times the sum of half a number x and 5 is 8"

Nadya [2.5K]

$10\left(\dfrac{1}{2}x+5\right)=8\ \ \ \ |use\ distributive\ property:a(b+c)=ab+ac\\\\5x+50=8\ \ \ \ |subtract\ 50\ from\ both\ sides\\\\5x=-42\ \ \ \ |divide\ both\ sides\ by\ 5\\\\x=-8.4$

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4 years ago

Solve the system by substitution. y = -7x + 4 10x – 10y = 40​

Solve the system by substitution. y = -7x + 4 10x – 10y = 40