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Harrizon [31]
3 years ago
10

5 ( y - 4)=7 (2y +1) Can someone help me out by solving for Y Thanks

Mathematics
1 answer:
boyakko [2]3 years ago
8 0
<h3>Given Equation:</h3>

5 ( y - 4 ) = 7 ( 2y + 1 )

<h3>To Find:</h3>

The value of y.

<h3>Solution:</h3>

5 ( y - 4 ) = 7 ( 2y + 1 )

or, 5y - 20 = 14y + 7

or, 5y - 14y = 7 + 20

or, -9y = 27

or, y = 27/-9 = -3

<h2>Answer:</h2>

The value of y is -3.

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Write an equation in point-slope form of the line that passes through the point 4,-1and has slope of -5
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Answer:

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Step-by-step explanation:

First of all, remember what the equation of a line is:

y = mx+b

Where:

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To start, you know what m is; it's just the slope, which you said was -5. So you can right away fill in the equation for a line somewhat to read:

y=-5x+b.

Now, what about b, the y-intercept?

To find b, think about what your (x,y) point means:

(4,-1). When x of the line is 4, y of the line must be -1.

Because you said the line passes through this point, right?

Now, look at our line's equation so far: . b is what we want, the -5 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the the point (4,-1).

So, why not plug in for x the number 4 and for y the number -1? This will allow us to solve for b for the particular line that passes through the point you gave!.

(4,-1). y=mx+b or -1=-5 × 4+b, or solving for b: b=-1-(-5)(4). b=19.

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Eli and Angela are saving money to buy their grandparents an anniversary gift. Eli has saved 8 more than 1/3 of Angela's savings
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Answer:

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Step-by-step explanation:

Let a = the amount Angela has saved.

Let e = the amount Eli has saved.

"Eli has saved $8 more than 1/3 of Angela's savings."

e = a/3 + 8

"If they each save $10 more." then

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Angela will have a + 10

"Eli will have saved $4 more than Angela's savings."

e + 10 = a + 10 + 4

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e = a/3 + 8

e = a + 4

Since both equations are solved for e, we just equate the right sides.

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