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Mathematics

1 answer:

nydimaria [60]3 years ago

5 0

the answer is the third choice

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What is the domain of the function f(x) = sqrt x-9 + 5?

klemol [59]

Answer:

D. x≥ 9

Step-by-step explanation:

√x-9 should be ≥ 0

so, x-9≥0

=> x ≥ 9

8 0

3 years ago

Jeff takes 20 minutes to jog around the race course one time, and 25 minutes to jog around a second time. What is his average sp

aksik [14]

Distance = rate*time
distance/time = rate

The race course is 3 miles around and Jeff does it twice, so the distance he goes = 2*3 miles = 6 miles.

He takes 20 minutes to go around once and 25 minutes to go around the second time, so the total time = 20 min + 25 min = 45 min.

His speed is miles per hour, not miles per minute, so convert 45 minutes to a hours:
45 min/60 min = 0.75 hours <span>distance/time = rate = 6 miles/0.75 hours = 8 mph</span>

6 0

3 years ago

Read 2 more answers

Correct and best answer will get brainliest and full ratings.

tensa zangetsu [6.8K]

M = 3
b = 8.25

you'll plug those numbers into this equation
y = mx + b

y = 3x + 8.25

your answer is D

8 0

3 years ago

What is the difference in area covered by a single 3 inch windshield wiper operating with a central angle of 138 degrees compare

Elena-2011 [213]

Answer:

38.9 square inches.

Step-by-step explanation:

We are asked to find the difference in area covered by a single 3 inch windshield wiper operating with a central angle of 138 degrees compared to a pair of 5 inch wipers operating together each having a central angle of 114 degrees.

We will use area of sector formula to solve our given problem as:

$\text{Area of sector}=\frac{\theta}{360}\times \pi r^2$ , where, r represents radius and theta represents central angle.