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2 years ago

Factor the following polynomials: a^2+a+72

Mathematics

1 answer:

allsm [11]2 years ago

7 0

Answer:

72 + a (1 + a)

Step-by-step explanation:

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If the shadow of a tree is 7 m long and the shadow of a person who is 0.9 m tall is 2 m long, how tall is the tree?

Assoli18 [71]

The tree is 3.15m tall.

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3 years ago

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Given the function f(x) = −5x2 − x + 20, find f(3).

lana66690 [7]

f(x) = -5x^2 - x + 20;

f(3) = -5*3^2 - 3 + 20 = -5*9 - 3 + 20 = -45 - 3 + 20 = -28;

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2 years ago

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What should be done to both sides of the equation in order to solve y + 8.5 = 17.2?

yan [13]

Answer:

subtract 8.5

Step-by-step explanation:

this will isolate y

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2 years ago

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Evan measured a line to be 20.4 inches long. If the actual length of the line is 19.6

e-lub [12.9K]

Answer:

4.08%

Step-by-step explanation:

% error = error/actual length × 100

Error = 20.4-19.6

= 0.8

% error = 0.8/19.6 × 100

= 4.08%

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2 years ago

A construction crew must build 4 miles of road in one week. On Monday, they build 12 mile of road. On Tuesday, they build 13 mil

Julli [10]

$\frac{19}{6}$ many more miles of road are left to build .

<u>Step-by-step explanation:</u>

Here we have , A construction crew must build 4 miles of road in one week. On Monday, they build 1/2 mile of road. On Tuesday, they build 1/3 mile of road. We need to find that How many more miles of road are left to build . Let's find out:

On Monday, they build 1/2 mile of road.
On Tuesday, they build 1/3 mile of road.

Let Miles of road left to build is x So,

⇒ $\frac{1}{2} +\frac{1}{3} +x = 4$

⇒ $x = 4 - (\frac{1}{2} +\frac{1}{3})$

⇒ $x = 4 - (\frac{1(3)+1(2)}{6} )$

⇒ $x = 4 - (\frac{5}{6} )$

⇒ $x = (\frac{4(6)-5}{6} )$

⇒ $x = \frac{24-5}{6}$

⇒ $x = \frac{19}{6}$

Therefore, $\frac{19}{6}$ many more miles of road are left to build .

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3 years ago

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