3 years ago

If 100% of a number is 15, then what is 50% of the number?

Mathematics

2 answers:

lbvjy [14]3 years ago

7 0

Answer:

7.5

Step-by-step explanation:

One way in which you could do this problem would be to write and solve an equation of ratios:

100% 15

--------- = ----------

50% x

Cross multipying results in 100x = 750, so that x = 7.5.

50% of the number is 7.5.

LuckyWell [14K]3 years ago

6 0

Answer:

The answer is 7.5.

Step-by-step explanation:

Since we're looking for half of 15, divide 15 by 2 (or multiply 15 by 0.5, it's the same thing) and you get 7.5.

I hope this helped! :)

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write the equation of a line that is perpendicular to the given line and that passes through the given point. y-4=5/2(x+3) ; (-7

faltersainse [42]

The gradient of the perpendicular line would be the negative reciprocal of the original line. Therefore the gradient of the perpendicular line would be -2/5x.
Since we know y=mx+c, ∴y=-2/5x+c. Sub in the x and y values of the given point and we get that c=26/5.

The perpendicular equation would be y=-2/5x+26/5.
I hope I got this right.

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3 years ago

Read 2 more answers

kelly has $50 in her checking account. she wrote a check for $75.00 which means that she’s overdrawn by $25. if she deposits $13

Zarrin [17]

Answer:

$120.50

Step-by-step explanation:

50 - 75 = -25

135.50 - 25 = 120.50

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3 years ago