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yKpoI14uk [10]
3 years ago
14

A) 3a + 5 (2a + 6) - 7a

Mathematics
1 answer:
Mrac [35]3 years ago
3 0

Answer:

A) 3a+10a+30-7a

=6a+30

B) 6b-32b+72+3b

=72+23b

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Find the volume of the rectangular prism.
stira [4]

Answer:

1 1/2*3 1/2*5= 5 cm^3

8 0
2 years ago
(3 power of 2) (3 power of 4)=
Ksju [112]

Answer:

729

Step-by-step explanation:

3 to the power of 2 means 3 * 3 which is 9.  3 to the power of 4 means 3 * 3 * 3 * 3 which is 81.  Finally, 9 * 81 which gives you 729.

5 0
2 years ago
What is the solution to this system of equations?
Eduardwww [97]

Answer:

x = -2, y = 3

Step-by-step explanation:

Given equations are,

4x + 5y = 7 ---------(1)

3x - 2y = -12 ----------(2)

Multiply equation (1) by 3

12x + 15y = 21 ------(3)

Multiply equation (2) by (-4)

-12x + 8y = 48 --------(4)

Now add equations (3) and (4),

(12x + 15y) + (-12x + 8y) = 21 + 48

(12x - 12x) + (15y + 8y) = 69

23y = 69

y = 3

From equation (2),

3x - 2(3) = -12

3x - 6 = -12

3x = 6 - 12

x = -2

Therefore, x = -2 and y = 3 will be the answer.

4 0
3 years ago
Read 2 more answers
Rama jumps 2m 30cm long and swathi jumps 2m 60cm in a competition what is the total distance they jumped together ​
Furkat [3]

Answer:

Step-by-step explanation:

2 m 30 cm

2 m 60 cm

+

_________

4m 90cm

8 0
3 years ago
A student fond the slope of a line that passes through the points (-8,-6) and (2,-3) to be 3/10. what mistake did she make?
goldfiish [28.3K]
Simple ....

we know to find slope is (y1-y2)/(x1-x2)

if we plug in what we know......

(-8,-6),(2,-3)

(-6--3)/(-8-2)

it turns into...

(-6++3)/(-8+-2)

(-3)/(-10)= 3/10

Thus, your answer is that she made no mistake. (C)
4 0
3 years ago
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