3 years ago

Please help with this

Mathematics

1 answer:

sergiy2304 [10]3 years ago

5 0

a. r + (-s) = r - s

b. r - (-s) = r + s

c. -r + (-s) = -r - s

d. -r - (-s) = -r + s

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a rhombus has an area of 60 square centimeters. if the length of one diagonal is 12 cm, find the length of the other

AlekseyPX

Answer:

10 cm

Step-by-step explanation:

The area (A) of a rhombus is calculated as

A = $\frac{1}{2}$ × d₁ × d₂ ( d₁ and d₂ are the diagonals )

Here A = 60, d₁ = 12, thus

60 = 0.5 × 12 × d₂ = 6 d₂ ( divide both sides by 6 )

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

100 POINTS PLEASE HELP ASAP!!!!!

UkoKoshka [18]

The two numbers are 31 and 35.

Step-by-step explanation:

Let,

one number = x

2nd number = y

According to statement;

x+y=66 Eqn 1

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Putting y=x+4 from Eqn 2 in Eqn 1;

$x+(x+4)=66\\x+x+4=66\\2x=66-4\\2x=62\\Dividing\ both\ sides\ by\ 2\\\frac{2x}{2}=\frac{62}{2}\\x=31\\Putting\ x=31\ in\ Eqn\ 2\\y=31+4\\y=35$

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Keywords: Linear equation, Addition

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3 years ago

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Answer:

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Step-by-step explanation:

6x²+7x=1

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3 years ago