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3 years ago

The formula for the eres of a triangle is A=2/1bh what is h equal to in terms of a and b

1 answer:

3 0

Actually the formula for the area of a triangle is A = 1/2bh.

First step: multiply both sides by 2, to get rid of the 1/2.

2A = bh

Now divide both sides by b.

2A/b = h or h = 2A/b

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Please help me on these questions.

KonstantinChe [14]

Answer:

Step-by-step explanation:

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5 0

3 years ago

In 1975 1000 tons of coal was manufactured. It is 10% greater in 1976 and 5% less in 77. What is the final about of coal in 1977

Digiron [165]

In 1975 it was 1000tons, ok, well, in 1976 it went up by 10%, how much is a 10% increase?

$\bf \begin{array}{ccllll}
coal&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1000&100\\
x&100+10
\end{array}\implies \cfrac{1000}{x}=\cfrac{100}{100+10}\implies \cfrac{1000\cdot 110}{100}=x
\\\\\\
1100=x$

well, in 1976 it was 1100 tons then, and in 1977 it went down by 5% of 1100, well, if we take 1100 to be the 100%, then what is a 5% decrease?

$\bf \begin{array}{ccllll}
coal&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1100&100\\
x&100-5
\end{array}\implies \cfrac{1100}{x}=\cfrac{100}{100-5}\implies \cfrac{1100\cdot 95}{100}=x$

5 0

3 years ago

If 18 gallons of gasoline cost $23.31 how much would 12 gallons cost

FinnZ [79.3K]

Answer:

15.60

Step-by-step explanation:

23.31/18=1.30 (for one gallon)

1.30*12=15.60 (for twelve gallons)

7 0

3 years ago

Read 2 more answers

How many real solutions does this system of equations have? x² + y² = 25 and x-3y=15

olya-2409 [2.1K]

$x - 3y = 15 \\ x = 15 + 3y$

$(15 + 3y) {}^{2} + y {}^{2} = 25$

$225 + 90y + 9y {}^{2} + y {}^{2} = 25$

$10y {}^{2} + 90y + 200 = 0$

$y {}^{2} + 9y + 20 = 0$

$(y + 4)(y + 5) = 0$

$y = - 4 \: \: \: \: \: \: y = - 5$

$for \: y= - 4 \\ x = 15 + 3( - 4) = 15 - 12 = 3$

$for \: y = - 5 \\ x = 15 + 3( - 5) = 15 - 15 = 0$

3 0

2 years ago

Greg’s house is 0.8 miles from the library. So far, Greg has walked 5/6 of the distance. How many miles has he walked in fractio

Anastaziya [24]

Greg has walked $\frac{2}{3}$ miles

<em><u>Solution:</u></em>

Given that, Greg’s house is 0.8 miles from the library

Distance between house and library = 0.8 miles

Greg has walked $\frac{5}{6}$ of the distance

Therefore,

Distance walked = $\frac{5}{6}$ of the distance between house and library

Here "of" means multiplication

Thus we get,

$\text{Distance walked } = \frac{5}{6} \text{ of } 0.8$

$\rightarrow \frac{5}{6} \times 0.8 = \frac{5}{6} \times \frac{8}{10}\\\\\text{Simplify the above fraction by reducing to lowest terms }\\\\\rightarrow \frac{5}{6} \times \frac{8}{10}=\frac{2}{3}$

Thus Greg has walked $\frac{2}{3}$ miles

8 0

4 years ago