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3 years ago

Which ordered pair is a solution of the equation y = -7x + 2

Mathematics

1 answer:

Irina18 [472]3 years ago

4 0

Answer:

B. (8, -54)

Step-by-step explanation:

y = -7x + 2

Check to see if the point makes the equation true

A. (1,2) 2 = -7(1)+2 = -7+2 = 5 False

B. (8, -54) -54 = -7(8)+2 = -56+2 = -54 True

C. (5, -35) -35 = -7(5) +2 = -35+2 = -33 False

D. (1, -7) -7 =-7(1)+2 = --7+2 = -5 False

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Please help <br> Find the value of x

jeka57 [31]

Answer:

Step-by-step explanation:

The sum of given angles must be equal to 360°

3x° + 2x° + 90° = 360°

5x + 90 = 360

5x = 270 divide both sides by 5

x = 54

3 0

3 years ago

Any help would be appreciated. (Check the picture)

White raven [17]

the answer would be 0.800375 but when you round it to the nearest tenth it would be 0.8

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3 years ago

A jar is filled with only dimes and quarters. The jar contains a total of 60 coins and the value of the jar is $11.25. How many

inessss [21]

Answer:

35 quarters

Step-by-step explanation:

This situation has two unknowns - the total number of dimes and the total number of quarters. Because we have two unknowns, we will write a system of equations with two equations using the two unknowns.

$d+q=60$ is an equation representing the total number of coins
$0.10d+0.25q=11.25$ is an equation representing the total value in money based on the number of coin. 0.10 and 0.25 come from the value of a dime and quarter individually.

We write the first equation in terms of q by subtracting it across the equal sign to get $d=60-q$ . We now substitute this for d in the second equation.

$0.10(60-q)+0.25q=11.25\\6-0.10q+0.25q=11.25\\6+0.15q=11.25$

After simplifying, we subtract 6 across and divide by the coefficient of q.

$6+0.15q=11.25\\0.15q=5.25\\q=35$

We now know of the 60 coins that 35 are quarters. To find the total value of the quarters, we multiply 35 by 0.25 and find 8.75.

3 0

3 years ago

Use a number line to explain why --15 ÷ 3 =-15

Diano4ka-milaya [45]

It's equal to -15 because you are dividing by an negative and if it's only 1 negative number in your equation then your answer will be a negative and if it's 2 negatives then it would be a positive answer

7 0

4 years ago

What type of triangle is this triangle?

Alex Ar [27]

Answer:

Scalene

Step-by-step explanation:

Because all of the sides are different lengths

4 0

3 years ago

Read 2 more answers