3 years ago

How to add and subtract rational numbers

Mathematics

1 answer:

fenix001 [56]3 years ago

7 0

Before you add or subtract, the rational numbers should have the same bottom number(called a common denominator.)

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Solve the inequality. 5 – 3a < –10

Murljashka [212]

Answer:

A=5

Step-by-step explanation:

5-3a<-10 is the same as

5-3a=-10

So to solve it just solve for a.

subtract 5 from both sides

-3a=-15

dived -3 from both sides to get a alone

A=5

hope this helps!

5 0

4 years ago

The graph depicts the growth and costs using of line segment use the midpoint formula to approximate the cost during the year 19

marysya [2.9K]

Answer:

The approximate cost during the year 1987 was $7,533

Step-by-step explanation:

The complete question in the attached figure

we have

y -----> is the cost in dollars

x -----> is the year

Looking at the graph we have the points

(1983,5,047) and (1991, 10,019)

To determine the cost in the year 1987, find out the midpoint between the two given points

The formula to calculate the midpoint between two points is equal to

$M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

substitute the values

$M=(\frac{1983+1991}{2},\frac{5,047+10,019}{2})$

$M=(1987,7,533)$

therefore

The approximate cost during the year 1987 was $7,533

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3 years ago

In a recent golf match, Desmond’s score was 3 less than George’s score. Their combined scores totaled 187. Let d represent Desmo

slavikrds [6]

It is C. George - Desmond is Desmond's score. And after you get their scores, you add them up to find the total.

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What is the length of line segment EF?

luda_lava [24]

The answer to this problem is...3.6

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Which of the following are valid names for the given polygon

barxatty [35]

B,C and D are correct because all of those choices include letters which are arranged in order from left of right.

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