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LuckyWell [14K]

2 years ago

7

Which expression is equivalent to 7^3 x 7^-5?

2 answers:

slavikrds [6]2 years ago

8 0

When multiply terms with exponents, simply add the exponents.

$7^{3} * 7^{-5} = 7^{-2} = \frac{1}{7^{2}}$

Hope this helps!

Nastasia [14]2 years ago

7 0

ANSWER:
C. 1/7^2

Hope it helps u!

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Classify the following triangle. Check all that apply. A. Scalene B. Right C. Acute D. Equilateral E. Obtuse F. Isosceles

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E and F

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Prove algebraically that the straight line with equation x=2y+5 is a tangent to the circle with equation x^2+y^2=5

zmey [24]

Differentiate both sides of the equation of the circle with respect to $x$ , treating $y=y(x)$ as a function of $x$ :

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This gives the slope of any line tangent to the circle at the point $(x,y)$ .

Rewriting the given line in slope-intercept form tells us its slope is

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In order for this line to be tangent to the circle, it must intersect the circle at the point $(x,y)$ such that

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