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3 years ago

Solve for x: x - 2 = 30 A: 28 B:-28 C:-32 D:32

Mathematics

1 answer:

Firlakuza [10]3 years ago

3 0

Answer:

32 is your answer

cancel out -2 by adding two to negative two, but what you do on one side you have to do to the other so then add 2 to thirty and your left with x =32

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The cost of a pound of nails increased from $2.17 to $2.52. What is the percent of increase to the nearest whole-number perce

Cloud [144]

Answer:

16% is the percent of increase to the nearest whole-number percent.

Step-by-step explanation:

As the cost of a pound of nails increased from $2.17 to $2.52.

$2.52 - $2.17 = $0.35

so dividing the 0.35 by 2.17 would give us the percetange of increase

0.35/2.17 = 0.16 which is 16%.

Therefore, 16% is the percent of increase to the nearest whole-number percent.

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3 years ago

The slope-intercept form given (6,-5) & perpendicular to -5x - 7y = -17.

tatuchka [14]

Answer:

$y=\dfrac{7}{5}x-\dfrac{67}{5}$

Step-by-step explanation:

Slope-intercept form of a linear equation:

$y=mx+b$

where:

m is the slope.
b is the y-intercept.

Rearrange the given equation so that it is in slope-intercept form:

$\implies -5x-7y=-17$

$\implies -7y=5x-17$

$\implies y=-\dfrac{5}{7}x+\dfrac{17}{7}$

Therefore, the slope of the given equation is -⁵/₇.

If two lines are perpendicular to each other (at right angles), the product of their slopes will be -1. Therefore, their slopes will be negative reciprocals of each other.

Therefore, the slope of the line perpendicular to the given equation is:

$\sf m=\dfrac{7}{5}$

Substitute the found slope and the given point (6, -5) into the slope-intercept formula and solve for b:

$\implies -5=\dfrac{7}{5}(6)+b$

$\implies -5=\dfrac{42}{5}+b$

$\implies b=-\dfrac{67}{5}$

Substitute the found slope and the found value of b into the slope-intercept formula to create the equation for the perpendicular line:

$\implies y=\dfrac{7}{5}x-\dfrac{67}{5}$

Learn more about slope-intercept form here:

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1 year ago

a group of friends went to lunch the bill sales tax and tip was 48.60 a sales tax of 7% was added the group then tipped 18% on t

Usimov [2.4K]

Answer:

Sales tax = $2.79

Step-by-step explanation:

(18 x 48.6) /100

= 8.748 = $8.75 tip amount total

48.60-8.748 = 39.852 sales total

(39.852 x 7)/100

= 2.78964 = $2.79 sales tax

39.852 - 2.78964 = 37.06236 = $37.06 cost of bill

Sales tax was asked = $2.79

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3 years ago

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Help in this hw ,Need to study for the state test

navik [9.2K]

Answer:

(2,-3)

Step-by-step explanation:

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3 years ago

2x+5=10 Solve for x

Katarina [22]

2x+5=10

Subtract 5 from both sides.
2x + 5 - 5 = 10 - 5
2x = 5

Divide both sides by 2.
2/2x = 5/2
x = 5/2

5/2 can be simplified to 2 1/2 or 2.5.

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3 years ago

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