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IceJOKER [234]
3 years ago
6

A free falling object increases speed by a little over 22 miles per hour each second. The arithmetic sequence 22,44,66..., repre

sents the speed after each second, in miles per hour, of a dropped object. How fast is a rock falling after 8 seconds if it is dropped over the side of a cliff
Mathematics
1 answer:
dimulka [17.4K]3 years ago
5 0

Answer:

176 mph after 8 seconds

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Factorise x(6x - 5y) - 4(6x - 5y)^2
Fed [463]

Answer:

(6x-5y)(20y-23x)

Step-by-step explanation:

x(6x - 5y) - 4(6x - 5y)^2

= (6x-5y)(x-4(6x-5y))

= (6x-5y)(x-24x+20y)

= (6x-5y)(20y-23x)

5 0
3 years ago
Which expression is equivalent to 2 (14x-37+28x+12.2-5y-17.5)?
ziro4ka [17]

Answer:

A. 84x - 16y - 10.6

Explanation:

\sf \rightarrow 2(14x-3y+28x+12.2-5y-17.5)

\sf \rightarrow 2 (42x-8y-5.3)

apply distributive method: a(b + c) = ab + ac

\sf \rightarrow 2 (42x) -2(8y)-2(5.3)

\sf \rightarrow 84x -16y-10.6

7 0
2 years ago
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the pro
Bogdan [553]

Answer:

Step-by-step explanation:

Let X be the length of pregnancy.

X is N(268, 15)

a) Prob of pregnancy lasting 307 days or longer

= P(X>307) = P(Z>\frac{307-268}{15} )\\=P(Z>2.6)\\

=0.5-0.4953

=0.0047

b) Lowest 2% is 2nd percentile

Z=-2.55

X score = 268-2.55(15)

= 229.75 days

If length of days >230 days then it is not premature.

4 0
3 years ago
ill give brainliest n a recent survey, 3 out of every 5 students said Math is their favorite class.If 200 students were surveyed
anyanavicka [17]

Answer: <em>D. 120 students</em>

Step-by-step explanation:

<em>This is an easy solution</em>

<em>Take 300 and divide it by 5</em>

<em>300/5</em>

<em>This will result in 40</em>

<em>Now Multiply 40 by 3</em>

<em>Like so: 40x3</em>

<em>This will result in </em><em>120</em>

6 0
3 years ago
Read 2 more answers
Find the product. Write your answer in<br> exponential form.<br> 6^-4•6^-9
Karolina [17]

Answer:

6^-13

Step-by-step explanation:

The rule for multiplying numbers with the same base but different exponents is a^b*a^c=a^(b+c), so in this case we have 6^(-4+(-9)) which is 6^-13

Hope this helped!

6 0
3 years ago
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