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Elena-2011 [213]
3 years ago
8

7th grade Math Help pleaseee

Mathematics
1 answer:
never [62]3 years ago
3 0

Answer:

14. 2

15. 7

16. 3

17. 8

11. 490

12. 9

13. 27

Step-by-step explanation:

14. 15y = 30 --> y = 30/15 = 2

15. 7t = 49 --> 49/7 = 7

16. 4 + 4x = 16 --> 4x = 16 - 4 = 12 --> x = 12/4 = 3

17. 4x + 2x = 48 --> 6x = 48 --> x = 48/6 = 8

11. r/7 = 70 --> r = 490

12. k/9 = 6 - 5 = 1 --> k = 9

13. b/3 = 9 --> 27

*You may plug in to check :)

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If the volume of a cuboid is 120 cm' and it has a length of 10cm, a height of 4cm, the width of the cuboid is ?
Misha Larkins [42]

Answer:

3cm

Step-by-step explanation:

V = L * W * H

V = 10 * W * 4

10 * 4 = 40

120 / 40 = 3

W = 3

6 0
2 years ago
Y<br><img src="https://tex.z-dn.net/?f=y%20%5Cleqslant%20%20-%20%20x%20-%201%20%5C%5C%20y%20%5Cgeqslant%202x%20%2B%204" id="TexF
Flura [38]
y\leq-x-1\\\\y=-x-1\\for\ x=-1\to y=-(-1)-1=1-1=0\to(-1;\ 0)\\for\ x=0\to y=-0-1=-1\to(0;-1)

y\geq2x+4\\\\y=2x+4\\for\ x=-2\to y=2\cdot(-2)+4=-4+4=0\to(-2;\ 0)\\for\ x=0\to y=2\cdot0+4=0+4=4\to(0;\ 4)

Answer in an attachment.

3 0
3 years ago
Is (5,3) a solution to this system of equation <br> X+y=8<br> 17x+17y=8
Degger [83]

(5, 3)

x    y

Plug in:

x + y = 8

5 + 3 = 8

8 = 8

Plug in:

17(5) + 17(3) = 8

85 + 51 = 8

136 = 8

Answer - No, (5, 3) is not a solution to this system of equations.

5 0
4 years ago
Dis time i needa find da rule
vovangra [49]

Answer:

f(x) = 4x

Step-by-step explanation:

Verification:
f(2) = 4 x 2 = 8

f(3) = 4 x 3= 12

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6 0
2 years ago
Read 2 more answers
John can reach 60 centimeters above the top of his head. If John is 2 meters tall, how high can he reach?
sineoko [7]

<em>Greetings!</em>

First, we know that <em>one</em> meter equals 100 centimeters, therefore,<em> two</em> meters equals 200 centimeters.

Here is your expression:

200 cm + 60 cm

Using our math skills, we know that 200 cm (2m) + 60 cm equals 260 cm or 2 meters and 60 centimeters.

Your answer would be 260 cm <em>or</em> 2 meters and 60 centimeters.

8 0
4 years ago
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