2 years ago

How do you prove that -4+1=-3?

Mathematics

1 answer:

Tems11 [23]2 years ago

8 0

Answer:

-4+1=-3

Step-by-step explanation:

If you were to use a number line=

-4 -3 -2 -1 0 1 2 3

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

On the number line, if you move 1 up from -4, it moves to -3

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80% of the students in Lea’s class earned an A or a B on the weekly math test. If 20 students got an A or a B, how many students

Anna35 [415]

Answer:

80 ÷ 4 = 20, so 100 ÷ 4 = 25 students

Step-by-step explanation:

Is means equals to and of means multiply

20 = 80% * N

20 = .80 N

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3 years ago

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The length of a rectangle is 3cm greater than its width. the perimeter of the rectangle is 34cm. find its length.

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Answer:

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Step-by-step explanation:

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$34=2(x+3+x)\\34=2(2x+3)\\Distribute\ the\ 2\ to\ each\ term\ in\ the\ parentheses\\34=2(2x)+2(3)\\34=4x+6\\Subtract\ 6\ from\ both\ sides\\4x=28\\Divide\ both\ sides\ by\ 4\\x=7$

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x+3=7+3=10cm

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2 years ago

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2 years ago

Consider triangle QRS. The legs each have a length of 10 units. Triangle Q R S is shown. Angle Q S R is 90 degrees. The length o

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Step-by-step explanation:

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3 years ago

The length of a rectangle is 3 inches shorter than its width. The perimeter of the rectangle is 50 inches.

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Step-by-step explanation:

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2 years ago