3 years ago

Help, I don’t understand

Mathematics

1 answer:

Sedbober [7]3 years ago

6 0

Answer:

A=90°,B=90°,C=90°,D=90°

Step-by-step explanation:

all of the numbers A-D add up to 360°

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6(a + 12) equivalent expressions

bearhunter [10]

6(a+12)

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3 years ago

Need help on this really bad

OleMash [197]

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3 years ago

Cual valor de 3 en 530 es 30 veces mayor que el valor de 3 en 300

yKpoI14uk [10]

The 3 in 530 is 1/10 of the value than in 300
3 en 530 es 1/10 valor 300
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7 0

3 years ago

A store pays $399 for a waterheater. The store marks up the price by 42% . What is the amount of the mark-up?

Lelu [443]

Answer:

Step-by-step explanation:

399*42%= 167.58 the mark up amount

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3 0

3 years ago

To reach a vacation spot, the Jones family first traveled by plane and then drove the

navik [9.2K]

The distance flown by plane is 750 kilometers.

Step-by-step explanation:

Let,

Distance traveled by plane = x

Distance traveled by car = y

Total distance = x+y

According to given statement;

The distance by car was 125 kilometers less than the distance by plane.

y = x - 125 => x=y+125 Eqn 1

The total distance was 500 kilometers less than three times the distance traveled by car.

Total distance = 3y - 500

x+y=3y-500 Eqn 2

Putting value of x from Eqn 1;

$(y+125)+y=3y-500\\y+y+125=3y-500\\2y=3y-500-125\\2y-3y=-625\\-y=-625\\y=625$

Putting y=625 in Eqn 1

$x=625+125\\x=750$

The distance flown by plane is 750 kilometers.

Keywords: linear equations, substitution method

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago