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nydimaria [60]
4 years ago
12

Solve by completing the square: x2 + 10x = 75

Mathematics
1 answer:
GuDViN [60]4 years ago
6 0

Answer:

x= -15, 5

Step-by-step explanation:

x²+10x-75=0

x²+15x-5x-75=0

(x+15)(x+5)=0

x= -15 and x=5

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Arnold skydives out of an airplane with a parachute. After he opened his parachute Arnold descended at 70feet per second. An obs
vivado [14]

Answer:

Arnold descended a distance of 5,250 ft after his parachute opened

Step-by-step explanation:

Here in this question, we want to know the distance Arnold descended after his parachute opened.

Mathematically, we know that distance = speed * time

In this case;

The speed is the rate at which he descended = 70 ft per second

Now the time is 1 minute and 15 seconds; since 1 minute is 60 seconds, then 1 minute and 15 seconds is 60 + 15 = 75 seconds

So what we are saying is he descended at a rate of 70 ft per second for 75 seconds

Thus, his distance of descent will be 70 ft per second * 75 seconds = 5,250 ft

4 0
3 years ago
Read 2 more answers
F(x) = x². What is g(x)?<br> A.g(x)=(1/3x)^2<br> B:g(x)=1/3x^2<br> C:g(x)=1/9x^2<br> D:g(x)=3x^2
lana [24]

Answer:

B

Step-by-step explanation:

We know that 3² = 9, so for g(x) to pass through (3,3), we need to multiply x² by 1/3, giving option B.

8 0
2 years ago
What is the first quartile (Q1) of the data set?
KATRIN_1 [288]
Sequence = 40, 45, 48, 51, 59, 62, 69, 74

Median = 51+59 / 2 = 55
First quartile = 40, 45, 48, 51 
So, it would be: 45 + 48 / 2 = 46.5

In short, Your Answer would be Option C

Hope this helps!
8 0
3 years ago
3 is 15% of what number
vazorg [7]
Use the rule of 3 simple 

x mean 100%
3 mean 15%
-------------------
 x = 3*100/15 = 300/15 = 20

hope this will help you 
6 0
3 years ago
Read 2 more answers
Which of the given pairs of expressions are equivalent? Select all that apply.
Artyom0805 [142]

Answer:

sorry I don't know about this Question

8 0
3 years ago
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