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3 years ago

Help me please! I can't figure this out

Mathematics

1 answer:

Alina [70]3 years ago

7 0

First we need to look at the greatest and least points on each axis.

For x - the greatest is 2 and the least is -2 (that is the value of x for the points marked in the top left and right quadrants of the xy axis.

(Note that the points on the number line have a value for x of 1 & -1, but you need to look at highest value of points in all quadrants.)

For y - the greatest would be 3 and the least 0. Looking up and down the Y axis, you can see these intersections for the points given.

Now you need to find the D & R that is suitable for these values. We can only consider the first and last option because it correctly shows that the values for x & 7 must be between 2 & -2 and 0 and 3, The first one is incorrect because they have the D & R reversed. It is x that must be between 2 & -2 and y that must be between 0 & 3.

I hope you found this helpful.

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Answer:

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Step-by-step explanation:

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So the number after it is 9 so we round up.

The number after 8 is 9

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2 years ago

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2 years ago

Two years ago, Rita was three times older than Cheryl. In 3 years, Rita will be twice older than Cheryl. How old are the girls n

Brrunno [24]

Answer:

Cheryl's age = x = 7 years

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Step-by-step explanation:

Let

Cheryl's age = x

Rita's age = y

Two years ago, Rita was three times older than Cheryl

(y - 2) = 3(x - 2)

y - 2 = 3x - 6

y = 3x - 6 + 2

= 3x - 4

y = 3x - 4

In 3 years, Rita will be twice older than Cheryl

(y + 3) = 2(x + 3)

y + 3 = 2x + 6

y = 2x + 6 - 3

= 2x + 3

y = 2x + 3

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Collect like terms

3x - 2x = 3 + 4

x = 7 years

Substitute x = 7 into

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= 2(7) + 3

= 14 + 3

= 17

y = 17 years

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