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insens350 [35]
3 years ago
7

Solve 4x−5=7+4y for y.

Mathematics
2 answers:
drek231 [11]3 years ago
6 0

4x−5=7+4y

subtract 7 from both side

4x - 5 -7 = 4y

4x -12 = 4y

divide by 4

4x/4 -12/4 = 4y/4

x-3=y

garri49 [273]3 years ago
5 0

Answer:

y = x - 3

Step-by-step explanation:

Given equation,

4x - 5 = 7 + 4y

For finding the equation for y,

We need to isolate y in the left side of the equation,

Now,

Add 5 on the both sides of the above equation,

4x = 7 + 4y + 5

Subtract 4y on the both sides,

4x - 4y = 12

Subtract 4x on both sides,

-4y = 12 - 4x

Divide both sides by -4,

y=x-3

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The data modeled by the box plots represent the battery life of two different brands of batteries that Mary tested. A) What is t
zhannawk [14.2K]

Answer:

Part A:

Median value for Brand X = 13

Median value for Brand Y = 16

Part B: Brand Y has a longer battery life

Step-by-step explanation:

Part A:

Median value is depicted on a box plot by the vertical line that divides the rectangular box. Therefore:

Median value for Brand X = 13

Median value for Brand Y = 16

Part B:

Brand Y has a higher median value (16) than Brand X (13).

This implies that brand Y has a battery life that last longer than brand X.

8 0
2 years ago
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Translate the sentence into an inequality.
Vadim26 [7]

Answer:

9(n + 22) ≤ -15

Step-by-step explanation:

9 times the sum of a number and 22 is at most −15

Let n = number

Times = multiplication

Sum = Addition

9 * n + 22

We must add parenthesis on the end on 22 and before n

We must do this because it says 9 times the sum of a number and 22 which means that 9 is being multiplied by both n and 22

We would have 9(n + 22)

9(n + 22) is at most -15

At most meaning that -15 is the highest number that 9(n + 22) can equal

Because it says at most 9(n + 22) can equal -15 or anything less than -15

So at most can be replaced with ≤

9(n + 22) ≤ -15

4 0
3 years ago
Find the surface area of the regular pyramid
Fofino [41]

Answer:

I do not know, but I do know the formula.

The formula is: 12pl+B where p represents the perimeter of the base, l the slant height and B the area of the base.

3 0
3 years ago
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I need help is due in 15 minute he’ll pls
aleksley [76]

Answer:

3x - 2 = 4(2x-8)

3x- 2 = 8x- 32

3x-8x = -32+2

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7 0
3 years ago
Lucy earns money babysitting. Her earnings and hours worked represent a direct variation. She worked for 4 hours and earned $25.
SashulF [63]

For this case we have that by definition, a direct variation is given in the form:

y = kx

Where:

k: It is the constant of proportionality

According to the statement we have to:

y = 25\\x = 4

Substituting:

25 = k4\\k = \frac {25} {4}k = 6.25\ for\ \frac {dollars} {hour}

On the other hand we have:

y = 4\\x = 25\\4 = k25\\k = \frac {4} {25}

k = 0.16\ for\ \frac {hours} {dollar}

Answer:

k = 6.25 for \frac {dollars} {hour}\\k = 0.16 for \frac {hours} {dollar}

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