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3 years ago

I really need an answer fast

Mathematics

1 answer:

VLD [36.1K]3 years ago

6 0

x=-7

We can write them both like functions like this

A= 5x -4

B= 3x +8

Where

x=input

A=Output A

B=Output B

We want the output of A 3 times the output of B this can be written like this:

A= 3b

we replace with the functions

5x-4 = 3(3x+8)

solve for x and you get -7

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marin [14]

Answer:

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Step-by-step explanation:

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3 years ago

Martin thinks of two numbers. He says "The Highest Common Factor (HCF) of my two numbers is 8 The Lowest Common Multiple (LCM) o

Mazyrski [523]

Answer:

30, 42

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the highest common factor of the 2 numbers in 6 the only factors the 2 numbers have in common are 2 and 3. each number must have 2 and 3 as factors.

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3 years ago

John painted 4/5 of his house the first day and 1/10 of the house the next day. What fraction of his house is left to paint?

Westkost [7]

Convert fifths into tenths: every one fifth equals two tenths

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4 0

3 years ago

{x + 6y = 27 7x -3y = 9

blondinia [14]

Answer: x=36

Simplifying

6x + 27 = 7x + -9

Reorder the terms:

27 + 6x = 7x + -9

Reorder the terms:

27 + 6x = -9 + 7x

Solving

27 + 6x = -9 + 7x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-7x' to each side of the equation.

27 + 6x + -7x = -9 + 7x + -7x

Combine like terms: 6x + -7x = -1x

27 + -1x = -9 + 7x + -7x

Combine like terms: 7x + -7x = 0

27 + -1x = -9 + 0

27 + -1x = -9

Add '-27' to each side of the equation.

27 + -27 + -1x = -9 + -27

Combine like terms: 27 + -27 = 0

0 + -1x = -9 + -27

-1x = -9 + -27

Combine like terms: -9 + -27 = -36

-1x = -36

Divide each side by '-1'.

x = 36

Simplifying

x = 36

Step-by-step explanation:

Hope it Helps :)

Brainliest pls? Have a good day/night

8 0

3 years ago

A phone plan costs $29.99 per month and includes 200 minutes of calling time. Minutes over 200 are charged at a rate of 25 cents

mylen [45]

Step-by-step explanation:

357-200 is 157 extra minutes (we are only counting the extra minutes)

157*0.25 is 39.25 (this is how much is the extra minutes in total cost)

therefore, add 39.25 and 29.99

29.99+39.25 is 62.24

Therefore, the total bill was $62.24

hope this helps :)

Have a nice day !

5 0

4 years ago