2 years ago

Which Expression is equivalent to -7 - (-2.5)

Mathematics

1 answer:

Verizon [17]2 years ago

6 0

Answer:

Step-by-step explanation:-4.5

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The height of a parallelogram is 5 feet more than it's base. If the area of the parallelogram is 204 square feet, what is its ba

siniylev [52]

The base is x.
The height is 5 feet more than the base, so it's x+5.
The area of a parallelogram is the product of its base and its height. The area is 204 square feet.

$x(x+5)=204 \\
x^2+5x=204 \\
x^2+5x-204=0 \\
x^2+17x-12x-204=0 \\
x(x+17)-12(x+17)=0 \\
(x-12)(x+17)=0 \\
x-12=0 \ \lor \ x+17=0 \\
x=12 \ \lor \ x=-17$

The length of the base of a parallelogram must be a positive number, so x=12.

$\hbox{the base:} \\ x=12 \\ \\
\hbox{the height:} \\ x+5=12+5=17$

The base is 12 feet long, the height is 17 feet long.

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2 years ago

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Tpy6a [65]

Answer:

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2 years ago

Mr. Davis has 15 students in his class he wants to send three of his students to pick up books for the class how many combinatio

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45 combinations

Step-by-step explanation:

15*3= 45

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Answer:

..........................................

Step-by-step explanation:

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2 years ago

You toss 3 coins what is the probability that you get exactly 2 heads given that you get at least one tail

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Seeing as there are three coins, which means there are 3 heads and 3 tails.There's only a 50% chance it'll land on either side one one coin. I believe the chances to get two heads, and one tail would be somewhere around 80%, since there are only 8 possible outcomes.

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3 years ago