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3 years ago

Find the product. (3p – 7)(3p + 7)

2 answers:

8 0

(3p - 7)(3p + 7) =
(3p × 3p) + (3p × 7) + (-7 × 3p) + (-7 × 7) =
9p^2 + 21p - 21p - 49
= 9p^2 - 49

Therefore, answer would be D.

aleksandrvk [35]3 years ago

3 0

Answer:

Step-by-step explanation:

to multiply the two factors we can use the concept of FOIL

so when we multiply the (3p – 7)(3p + 7)

we get

$(3p -7)(3p + 7) = 3p.3p+3p.7-3p.7-7.7$

$9p^2-21p+21p-49$ (cancel the 21p)

$9p^2-49$

correct option is D.

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Step-by-step explanation:

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3 years ago

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3 years ago

find the side lengths of each triangle. I can't figure out the formula. awnsers with work would be most helpful. Im having most

34kurt

18. (if you needed it)

The triangle is an equilateral triangle, it has 3 congruent/equal side lengths and 3 congruent angles.

To find "z", you can set the sides equal to each other (you can just do two sides since they are all suppose to be the same lengths)

z + 5 = 4z - 4 Subtract z on both sides

5 = 3z - 4 Add 4 on both sides

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Plug this into one of the sides

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[proof]

z + 5

3 + 5 = 8

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4(3) - 4

12 - 4 = 8

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19. This is an isosceles triangle, which is a triangle that has 2 congruent sides and 2 congruent angles. (The red tick marks shows that the sides are the same/equal)

Since the 2 sides are the same length, you can set them equal to each other to find "x":

2x + 6.8 = 8x + 1.4 Subtract 2x on both sides

6.8 = 6x + 1.4 Subtract 1.4 on both sides

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Now that you know x, you can find the sides:

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4 years ago

An investment counselor calls with a hot stock tip. he believes that if the economy remains strong, the investment will result

anzhelika [568]

Answer: $ 16,000 profit

Step-by-step explanation:

Given the following :

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Probability of strong economy; p(strong) = 30/100 = 0.3

Probability of moderate; P(moderate) = 60/100 = 0.6

Probability of recession; P(recession) = 10/100 = 0.1

Expected profit :

Summation of the product of each probability and its accompanying profit or loss.

P(strong) × profit of strong = 0.3 × 50000 = 15000

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Expected profit :

$(15,000 + 6000 - 5000) = $16,000 profit

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