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artcher [175]
3 years ago
12

5 A pile driver drives a post 9 ft into the ground on its first hit. Each additional hit

Mathematics
1 answer:
max2010maxim [7]3 years ago
5 0

Answer:

54

Step-by-step explanation:

just times the 9 by 6

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Solve the equation, and check your solution.<br> -3/5n = -9
jasenka [17]

Answer:

-15 = n

Step-by-step explanation:

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3 years ago
If x2 = 30, what is the value of x?<br> A. ±60 B. ±15 C. ±square root of 30 D.±square root of 15
anygoal [31]

Answer:

  C.  ±square root of 30

Step-by-step explanation:

Apply the square root function to both sides of the equation:

  \sqrt{x^2}=\sqrt{30}\\\\|x|=\sqrt{30}\\\\x=\pm\sqrt{30}

_____

The absolute value equation has two solutions. They match choice C.

6 0
3 years ago
Suppose a birth defect has a recessive form of inheritance. In a study population, the recessive gene (a) initially has a preval
BabaBlast [244]

Answer:

Step-by-step explanation:

a) Maternal gene = 0.25; Paternal gene = 0.25

Probability having a birth defect = 0.25 X 0.25 = 0.625

b) P(A) = 0.30; P(B) = 0.70

P(A)*P(B) = 0.30 X 0.70 = 0.021

For marriage:

25%: P(A)*P(A)*0.25 = 0.09 X 0.25 = 0.0225

65%: P(B)*P(B)*0.65 = 0.049 X 0.65 = 0.03185

10%: P(A)*0.10 = 0.03 and P(B)*0.10 = 0.07

P(A)*P(B) = 0.03 X 0.07 = 0.0021

Probability of a defect birth in the next generation = 0.0225 + 0.03185 + 0.0021 = 0.05645

c) 1. P(A)*P(A) = 0.09

2. P(B)*P(B) = 0.049

3. P(A)*P(B) = 0.021

4 0
3 years ago
The electronics store sold 4 laptop computers in one day. The total of the laptops was $3,600. If each laptop cost the same amou
Lina20 [59]
Each laptop will cost $900: $3,600 / 4 = 900
7 0
3 years ago
Read 2 more answers
A lawn sprinkler spins in a circle. The sprinkler covers a radius of 4 feet. Which choice is the closest to the area of lawn tha
pishuonlain [190]

Answer:

C

Step-by-step explanation:

Use the circle area formula.

A = pi * r^2

A = pi * 4^2

A = pi * 16

A = 50.27

6 0
3 years ago
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