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3 years ago

Solve 7x + 1 < 4(x - 2).

Mathematics

1 answer:

andrey2020 [161]3 years ago

4 0

x<<span>−<span>3
hope this helps! (:</span></span>

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Choose the fraction that is greater than 3/18٫is less than 50/100٫and has 9 as its denominator

erik [133]

Answer:

4/9

Step-by-step explanation:

The denominator is the bottom value of a fraction, therefore we can discount 9/2

1/9 = 2/18. 2/18 is smaller than 3/18 so we can discount 1/9

50/100 = 0.5
5/9 = 0.55555...
0.55555... is greatest than 0.5, therefore we can discount 5/9

Answer is 4/9

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2 years ago

How do i do this i'm really confused it's nothing i've done before

laila [671]

What is the question pls so I might be able to help

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3 years ago

PLEASE HELP, ITS TIMED SO HURRY PLEASE>>>>>>>

Olegator [25]

Answer:

The answer is noncollinear

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Mr Kendrick is trying to organize his year 7 class into rows for their class photograph. If Mr Kendrick wishes to organize the 2

inysia [295]

Just list the factors of 24. Those are the possible numbers of students that can be in each row.

1,2,3,4,6,8,12,24 are the possible row sizes.

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3 years ago

A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 70% pure anti

andre [41]

Answer:

First brand of antifreeze: 21 gallons

Second brand of antifreeze: 9 gallons

Step-by-step explanation:

Let's call A the amount of first brand of antifreeze. 20% pure antifreeze

Let's call B the amount of second brand of antifreeze. 70% pure antifreeze

The resulting mixture should have 35% pure antifreeze, and 30 gallons.

Then we know that the total amount of mixture will be:

$A + B = 30$

Then the total amount of pure antifreeze in the mixture will be:

$0.2A + 0.7B = 0.35 * 30$

$0.2A + 0.7B = 10.5$

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:

$-0.7A -0.7B = -0.7*30$

$-0.7A -0.7B = -21$

$0.2A + 0.7B = 10.5$

--------------------------------------

$-0.5A = -10.5$

$A = \frac{-10.5}{-0.5}$

$A = 21\ gallons$

We substitute the value of A into one of the two equations and solve for B.

$21 + B = 30$

$B = 9\ gallons$

3 0

2 years ago