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2 years ago

An isosceles triangle has a base of 4 and a height of x+3. If the area is 10, what is the value of x?

1 answer:

5 0

The area of a <span>isosceles triangle:
S=(bh)/2, where b is for base (=4) and h is for height (=x+3)
We get the equation:
10=(4*(x+3))/2
10=(4x+12)/2
4x+12=20
4x=8
x=2
</span>

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-8.5÷3.4 how to solve this step by step

sertanlavr [38]

You have to move both decimals over and then divide. So the answer is 25.

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2 years ago

If x varies directly with y and x = 2.5 when y = 10, funny x when y = 16.

amid [387]

Answer:

Should be 4.0(Not sure tho. my thought process is complicated but to me it makes sense)

Step-by-step explanation:

If y=10 and x =2.5, if y were to = 20, then x would equal 5. so you take that ratio, and say 6 is 3/5's the way to 10, so you also divide 2.5 by 3/5

you get 1.5, you add that to x already and you get 4.0

so if y=16, x should =4.0

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2 years ago

11x + 12 = 8x - 9 ... please

Marat540 [252]

Assignment: $\bold{\Solve \ Equation: \ 11x+12=8x-9}$

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Answer: $\boxed{\bold{x=-7}}$

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Explanation: $\downarrow\downarrow\downarrow$

<><><><><><><>

[ Step One ] Subtract 12 From Both Sides

$\bold{11x+12-12=8x-9-12}$

[ Step Two ] Simplify

$\bold{11x=8x-21}$

[ Step Three ] Subtract 8x From Both Sides

$\bold{11x-8x=8x-21-8x}$

[ Step Four ] Simplify

$\bold{3x=-21}$

[ Step Five ] Divide Both Sides By 3

$\bold{\frac{3x}{3}=\frac{-21}{3}}$

[ Step Six ] Simplify

$\bold{x=-7}$

<><><><><><><>

$\bold{\rightarrow Mordancy \leftarrow}$

4 0

2 years ago

Read 2 more answers

Choose a number between 67 and 113 that is a multiple of 2 6 and 10

Lilit [14]

Im going to go on and say that it is 90

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2 years ago

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What is the measure of one side of the square if its area is 100x² - 160x + 64?

earnstyle [38]

The Area of a Square is the square of the measure of one side of the square.

Hence, given the expression for the area of a square, express the given area as the square of an expression to get the measure of one side.

The given expression is:

$100x^2-160x+64$

Rewrite the expression as:

$\begin{gathered} 10^2x^2-(2\times10\times8)x+8^2 \\ =(10x)^2-(2\times10x\times8)+8^2 \end{gathered}$

Recall the binomial expansion:

$(a-b)^2=a^2-2ab+b^2$

Substituting a=10x and b=8, it follows that the expression becomes:

$(10x-8)^2$

Since the area of a square is the square of the measure of one side, it follows that the measure of one side from the given expression is 10x-8.

8 0

4 months ago