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coldgirl [10]
3 years ago
6

Need help with these questions. Any tips?

Mathematics
1 answer:
Darya [45]3 years ago
3 0

Answer:

1)

Isolate for the variable m

-13 = 5  + 20m -2m

-13 = 5 + 18 m

-18 = 18 m

m = -18/18

m = -1

2) same thing

11 + 8r = -r +29

8r + r = 29 - 11

9r = 18

r = 18 / 9

r = 2

3) same thing

4x +6 +3 = 17

4x = 17 - 6 - 3

4x = 17 - 9

4x = 8

x = 8 /4

x =2

4) Same thing

-8(-8x - 6) = -6x -22

64x +48 = -6x -22

64x +6x = -22 -48

70x = -70

x= -70/70

x = -1

<u>I would go through these on your own to make sure that you understand.</u>

Step-by-step explanation:

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What magic trick??

Are you gonna do a magic??

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3 0
2 years ago
HELP ME AGAIN I MIGHT PASS
trapecia [35]

Answer:

x=70

Step-by-step explanation:

it's 70 because 50 and 20 is proportional to x

4 0
2 years ago
Read 2 more answers
If y is inversely proportional to the square root of x and y=−70 when x=49, find y if x=2401.
Dahasolnce [82]

The value of y when x= 2401 is -10

<h3>How to determine the value of x?</h3>

An inverse variation is represented as:

y = \frac{k}{\sqrt x}

Where k is the proportionality constant

When y = -70, x = 49

So, we have:

-70 = \frac{k}{\sqrt {49}}

Take the square root of 49

-70 = \frac{k}{7}

Multiply through by 7

k = -490

Substitute k = -490 in y = \frac{k}{\sqrt x}

y = -\frac{490}{\sqrt x}

When x =2401, we have

y = -\frac{490}{\sqrt {2401}}

Evaluate the square root

y = -\frac{490}{49}

Divide

y = -10

Hence, the value of y when x= 2401 is -10

Read more about variation at:

brainly.com/question/14254277

#SPJ1

4 0
2 years ago
Factorise fully 2a^2b + 6ab^2​
Inga [223]

Answer:

2ab(a + 3b)

Step-by-step explanation:

2a²b + 6ab²​

Factor out 2ab

2ab(a + 3b)

4 0
3 years ago
Read 2 more answers
∠5 ​ and​ ​ ∠6 ​ ​are complementary angles.<br><br> m∠5=13°<br><br> What is the measure of ​ ∠6 ​?
loris [4]

Answer:

the measure of <6 is 77 degrees

x + 13 = 90

x = 77

Step-by-step explanation:

4 0
3 years ago
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