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inna [77]
3 years ago
11

7 is 40% of what number? If necessary, round to the nearest tenth.

Mathematics
1 answer:
bazaltina [42]3 years ago
7 0
7 is 40<span> percent of 17.5 </span><span>Formula: (7 / 17.5) * 100 = <span>40
Answer: 17.5</span></span>
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Write an equation of the line that is perpendicular to y = 1/2x + 3 and passes through the point (10, -5).
o-na [289]

Answer:

Option A) y = -2x + 15

Step-by-step explanation:

step 1

Find the slope of the line perpendicular to the given line

we know that

If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)

The equation of the given line is

y=\frac{1}{2}x+3

so

The slope of the given line is  m=\frac{1}{2}

therefore

The slope of the line perpendicular to the given line is

m=-2

step 2

Find the equation of the perpendicular line in point slope form

y-y1=m(x-x1)

we have

m=-2

point\ (10,-5)

substitute

y+5=-2(x-10) ---> equation in point slope form

Convert to slope intercept form

y=mx+b

y+5=-2x+20

y=-2x+20-5

y=-2x+15

4 0
3 years ago
Find the length of a rectangle if its
Alina [70]

Answer: L = 29cm

Step-by-step explanation:

Let's go!!

To find any rectangle area, you have to apply this formula: A = L . w , where L is the length and w is the width.

So, we have w = L - 13 (the width is 13 less than the Length) and then, perimeter is 90 cm.

Well, I hope you remember that the perimeter of rectangle is 2L + 2W. In this case, 2L + 2w = 90

Then, you might to solve this system of equation:

2L + 2w = 90

w = L - 13

Simplifying the first equation, you'll have L + w = 45 (you can divide everything of 2).

Our new system:

L + w = 45

w = L - 13

Using the substituition method:

L + L - 13 = 45

2L = 58

L = 29 cm

the width is 29 - 13 = 16 cm

4 0
4 years ago
A
lys-0071 [83]

Answer:

D)86400 seconds

Step-by-step explanation:

<u><em>In 1 hour there are 60 minutes and in 1 minute there are 60 seconds.</em></u>

<em>Brainliest?</em>

6 0
2 years ago
Read 2 more answers
Please help Me Solve This Geometry Problem
frozen [14]

6h+5(h-5)= 52

Mutiply the bracket by 5

(5)(h)(5)(-5)= 5h-25

6h+5h-25= 52

move -25 to the other side

sign changes from -25 to +25

6h+5h-25+25= 52+25

6h+5h= 77

11h= 77

divide by 11

11h/11= 77/11

Cross out 11 and 11, divide by 11 and becomes 1*1*h= h

h= 7

Answer: h= 7

5 0
3 years ago
Which transformation(s) can be used to map one triangle onto the other? reflection only translation only dilation, then translat
Goshia [24]

Answer:

reflection only

rotation, then translation

Step-by-step explanation:reflection only       rotation, then translation

7 0
3 years ago
Read 2 more answers
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