Which expression is equivalent to (7^3)−2?

Mathematics

2 answers:

uysha [10]4 years ago

8 0

(7^3)-2=341
(7*7*7)-2=341

uranmaximum [27]4 years ago

3 0

Reemmeber
$(x^m)^n=x^{mn}$ and
$x^{-m}= \frac{1}{x^m}$

so
$(7^3)^{-2}=7^{-6}= \frac{1}{7^6}$

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Find the x-intercept of the parabola of with vertex (1,20) and the y-intercept (0,16). write your answer in this form: (x1,y1),(

svetoff [14.1K]

I assume that the parabola in this particular problem is one whose axis of symmetry is parallel to the y axis. The formula we're going to use in this case is (x-h)2=4p(y-k). We know variables h and k from the vertex (1,20) but p is not given. However, we can solve for p by substituting values x and y in the formula with the y-intercept:

(0-1)^2=4p(16-20)

Solving for p, p=-1/16.

Going back to the formula, we can finally solve for the x-intercepts. Simply fill in variables p, h and k then set y to zero:

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x=sqrt(5)+1 and
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Step-by-step explanation: