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soldi70 [24.7K]
3 years ago
7

Really need help !!!!:(

Mathematics
1 answer:
ANEK [815]3 years ago
5 0
4

Is 4/10 which can be simplified to 2/5
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Forth grade math: What happens to the area of the triangle when one of the dimensions is doubled and halved?
Alja [10]

\bf \textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ b=\stackrel{doubled}{2b} \end{cases}\implies A=\cfrac{1}{2}(2b)(h)\implies \stackrel{\textit{twice as the original area}}{A=bh} \\\\[-0.35em] ~\dotfill

\bf \textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ h=\stackrel{halved}{\frac{h}{2}} \end{cases}\implies A=\cfrac{1}{2}b\left( \cfrac{h}{2} \right)\implies \stackrel{\textit{half of the original area}}{A=\cfrac{1}{2}bh\left( \cfrac{1}{2} \right)}

7 0
4 years ago
Can someone help me with this ASAP!
asambeis [7]

The following correct answer is c.

This I because when you translate using this, you first start with the point (0,0), translate that point down 3 (-3 means down three when outside parenthesis) and translate it to the right 4 units (this shown in a paraptosis, and when you move to the right you say -4, but if you move to the left you say +4)

4 0
3 years ago
Read 2 more answers
Select ALL the intervals where f(x)= -x^3 + 3x^2 +1 is only decreasing.
Sphinxa [80]

Answer:

5 < x < ∞

-∞ < x < 0

2 < x < ∞

Step-by-step explanation:

Given function is -x^{3} + 3x^{2} + 1.

To, Calculate where the function is increasing or decreasing,

we have to calculate the derivative of the function,

so,

f'(x) = -3x^{2} + 6x.

Equating the f'(x)= 0 , we get

x(-3x + 6) = 0

So, f'(x) will be zero at x = 0 and x = 2.

f(x) will be decreasing in the interval where f'(x) will be negative.

now as the coefficient of f'(x) is negative it will be negative between

the interval -∞ < x < 0 and 2 < x < ∞.

Options which lie in these intervals only are

5 < x < ∞

-∞ < x < 0

2 < x < ∞

3 0
3 years ago
What is the prime of 65
lianna [129]
The prime of 65 is 13 * 5
5 0
3 years ago
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Pppllllzzzz help i cant sleep tell this is done
Mice21 [21]

The answers would be 12 and -16

4 0
3 years ago
Read 2 more answers
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