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2 years ago

5

Math grades assignment unit test part 2 adding and subtracting rational numbers?

1 answer:

Katena32 [7]2 years ago

3 0

Answer: When we add or subtract rational numbers that have the same denominator, we add or subtract only the numerators. The denominators stay the same. When we add or subtract rational numbers with unlike denominators, we need to change the rational numbers to equivalent rational numbers that have the same denominators, before we find the sum or difference. Adding & Subtraction Rational Numbers

Step-by-step explanation:

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AlexFokin [52]

Answer:

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Step-by-step explanation:

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2 years ago

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A skydiver is falling out about 176 ft./s. How many feet per minute is he falling??

Lady bird [3.3K]

How many seconds are in a minute?

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3 years ago

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KonstantinChe [14]

Answer:

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Step-by-step explanation:

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2 years ago

denis23 [38]

Answer:

$B = 325$

Step-by-step explanation:

Given

Total = 900

Singing = 600

Dancing = 500

None = 125

Required

Determine the number of students that participate in both

Representing; Singing with S, Dancing with D, Both singing and dancing with B and None with N;

In Set Notation;

$Total = (S - B) + (D - B) + N + B$

Substitute 900 for Total, 600 for S, 500 for D and 125 for N

$900 = (600 - B) + (500 - B) + 125$

Open Brackets

$900 = 600 - B + 500 - B + 125 + B$

Collect Like Terms

$900 = 600 + 500 + 125 - B - B + B$

$900 = 1225- B - B + B$

$900 = 1225- B$

Collect Like Terms

$900 - 1225 = -B$

$-325 = -B$

Multiply both sides by -1

$-1 * -325 = -B * -1$

$325 = B$

Reorder

$B = 325$

<em>Hence, the number of students that do not participate in both is 325</em>

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3 years ago

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Kruka [31]

Answer:

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positive

negative

positive

Step-by-step explanation:

-0.25

1/10

-0.2

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2 years ago