Answer:
2.5×3.9×10^(26-15) = 9.75×10^(11)
Your answer choices are cut off. It appears that choice B isn't shown. However, if
-7x = -56
then
x = 8
the result is positive due to the fact that dividing two negatives (-56 over -7) leads to a positive result. As a check, replace x with 8 to get...
-7x = -56
-7*x = -56
-7*8 = -56
-56 = -56
the fact that we get the same value on both sides confirms we have the right answer.
Answer:
x=10
Step-by-step explanation:
9514 1404 393
Answer:
3) D
4) D
5) B
6) B
Step-by-step explanation:
3) A "Pythagorean triple" is a set of 3 integers that could be the sides of a right triangle. The only triangle shown with integer side lengths is choice D.
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5) The only triangle for which the square of the hypotenuse is the sum of the squares of the other two sides is choice D.
11² +2² = (5√5)²
121 + 4 = 125
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6) The lengths of sides of each right triangle are 2/3 of those of choice D in problem 4. That is, they are a 7-24-25 triangle, multiplied by 2. That means the height is 24·2 = 48, and the area is ...
A = 1/2bh
A = 1/2(28 m)(48 m) = 672 m² . . . . matches choice B
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7) The side lengths of a 30-60-90 triangle have the ratios 1 : √3 : 2. That is, the short leg is half the hypotenuse, a fact stated in A and D. Those true statements make it clear that statement B is false.
Answer:
197.192
Step-by-step explanation:
62.8x3.14=197.192
