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Gennadij [26K]
3 years ago
8

-25 – (-13) = mathematics

Mathematics
1 answer:
bonufazy [111]3 years ago
7 0
It would be -12, because you have to use keep change change
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The rectangular pool is 45 feet x 18 feet. The fence needs to be 5 ft away from the edges of the pool or a 5 ft border. How many
Mama L [17]

Answer:

The length of fencing is 146 feet.

Step-by-step explanation:

The length of fencing is equal to the perimeter of the rectangle plus 8 times the width of the border between the edge of the pool and the fence. By Geometry, we find that the perimeter (p), measured in feet, is equal to:

p = 2\cdot (w+f)+2\cdot (l+f) (1)

Where:

w - Width of the pool, measured in feet.

l - Length of the pool, measured in feet.

f - Width of the border, measured in feet.

If we know that w = 45\,ft, l = 18\,ft and f = 5\,ft, then the length needed of fencing is:

p = 2\cdot (45\,ft+5\,ft)+2\cdot (18\,ft+5\,ft)

p = 146\,ft

The length of fencing is 146 feet.

4 0
3 years ago
Which statement is true of triangles QRS and MNP?
timama [110]

Answer:

They are similar because their corresponding angles are congruent and their corresponding side lengths are proportional.

Step-by-step explanation:

we know that

If two figures are congruent, then its corresponding sides and its corresponding angles are congruent

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

In this problem

Corresponding angles are congruent

because

∠Q≅∠M

∠R≅∠N

∠S≅∠P

Corresponding sides are proportional

because

\frac{QR}{MN}=\frac{RS}{NP}=\frac{QS}{MP}

substitute the given values

\frac{6}{3}=\frac{2}{1}=\frac{6.32}{3.16}

2=2=2 ----> is true

therefore

They are similar because their corresponding angles are congruent and their corresponding side lengths are proportional.

3 0
4 years ago
Read 2 more answers
A store is having a sale on chocolate chips and walnuts. For
Airida [17]
$1 chocolate and $2.5 walnuts
5c+2w=10
3c+8w=23

elimination 

-4(5c+2w=10) =-20c-8w=-40  + 3c+8w=23

=-17c=-17
c=1

5(1)+2w=10
2w=5
w=2.5

3 0
3 years ago
2/7 divided by 1 2/7
LekaFEV [45]

Answer: 0.22

Step-by-step explanation:

4 0
3 years ago
5. Zoe and Claire are sisters. They are giving clues about their heights. Write an equation and
Helen [10]

Using a system of equations, it is found that:

  • Zoe is 36 inches tall.
  • Claire is 72 inches tall.

------------------------

  • The heights are unknown, so we are going to call it x and y.
  • x for Claire, y for Zoe.
  • Claire is twice as tall as Zoe, thus x = 2y
  • Together, they are 108 inches tall, thus:

x + y = 108

Since x = 2y

2y + y = 108

3y = 108

y = \frac{108}{3}

y = 36

x = 2y = 2(36) = 72

Zoe is 36 inches tall.

Claire is 72 inches tall.

A similar problem is given at brainly.com/question/17096268

8 0
3 years ago
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