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vlada-n [284]
3 years ago
5

What is the value of a? 9

Mathematics
1 answer:
Vera_Pavlovna [14]3 years ago
6 0

ΔBED and Δ DEC are similar (AAA). Therefore we have the proportion:

\dfrac{a}{18}=\dfrac{4}{a}      <em>cross multiply</em>

a^2=(18)(4)\\\\a^2=72\to a=\sqrt{72}\\\\a=\sqrt{36\cdot2}\\\\a=\sqrt{36}\cdot\sqrt2\\\\\boxed{a=6\sqrt2}

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true

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Step-by-step explanation:

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Read 2 more answers
Which statement about the graphs of h(x)=−2x+4 and k(x)=4x−4 is correct?
gayaneshka [121]

Answer:

  A:  The x-intercept of k(x) is half the x-intercept of h(x)

Step-by-step explanation:

Answer choices B, C, and D are concerned with slopes and y-intercepts. The coefficients of x in the functions are different and are related by a factor of -2, so the lines are not parallel, and one slope is not twice the other. The y-intercepts (constants) in each function are different, so they graphs do not cross the y-axis at the same place.

Hence answer choices B, C, and D can be eliminated.

The x-intercepts are found by setting y=0 and solving for x:

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7 0
3 years ago
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OLga [1]

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Step-by-step explanation:

Given

Hypotenuse of isosceles triangle is 8 inches

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Using Pythagoras we can write

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Therefore, the lengths of the legs is 5.6 inches

3 0
4 years ago
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