3 years ago

How to solve it? please help me

Mathematics

2 answers:

wariber [46]3 years ago

6 0

Answer:

$7x^{-4}$

natita [175]3 years ago

4 0

Answer: 1/2401

Explain

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What is the simplified expression for -3(2x-7)+2y+ 2(x+y)?

PilotLPTM [1.2K]

Answer:

-4x+4y+21

Step-by-step explanation:

-3(2x-7)+2y+2(x+y)

-6x+21+2y+2x+2y

-4x+21+4y

-4x+4y+21

Expanded and simplified :)

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3 years ago

Solve 3(a + 3) – 6 = 21. Write a reason for each step.

kakasveta [241]

Answer:

Step-by-step explanation:

3(a+3)-6=21

<=>3a+9-6=21

<=>3a+3=21

<=>3a=18

<=>a=6

7 0

3 years ago

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LAST ONE \small \angle L and \small \angle M are supplementary, \small m\angle L=12x+45 and \small m\angle M=18x-30. Determine t

FinnZ [79.3K]

Answer:

$m\angle L = 111\degree \\m\angle M = 69\degree$

Step-by-step explanation:

Since, angle L and angle M are supplementary.

$\therefore m\angle L + m\angle M= 180\degree \\ \therefore \: 12x + 45 + 18x - 30 = 180 \degree \\ \therefore \: 30x + 15= 180 \degree\\ \therefore \: 30x= 180 \degree - 15 \degree\\ \therefore \: 30x= 165 \degree \\ x = \frac{165 \degree}{30} \\ x = 5.5 \degree \\ \\ m\angle L = 12x + 45 \\ m\angle L = 12 \times 5.5 + 45 \\ m\angle L = 66 + 45 \\ \huge \red{ \boxed{ m\angle L = 111 \degree}} \\ \\ m\angle M=18x - 30 \\ m\angle M=18 \times 5.5 - 30 \\ m\angle M=99 - 30 \\ \huge \purple{ \boxed{ m\angle M=69 \degree}} \\$

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3 years ago

Solve the system of equations. −5x+2y=9 y=7x

RUDIKE [14]

Answer:

x=1 y=7

Step-by-step explanation:

−5x+2y=9

y=7x

Substitute the second equation into the first

-5x +2(7x) = 9

Distribute

-5x +14x = 9

Combine like terms

9x=9

Divide by 9

9x/9 =9/9

x= 1

Now find y

y = 7(1)

y = 7

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4 years ago

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Solve 3|x - 61 = 12.

Alika [10]

Last option
-2 is ur answer

3 0

3 years ago

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How to solve it? ​please help me

How to solve it? please help me