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12345 [234]
2 years ago
12

Paintbrushes cost $0.55 each at a certain store. Evelyn spent $3.85 on paintbrushes.

Mathematics
2 answers:
Anvisha [2.4K]2 years ago
5 0

Answer simply 7

Step-by-step explanation:

Darina [25.2K]2 years ago
4 0
She bought 7 paintbrushes
3.85/ 0.55= 7
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Tim installs 50 square feet of his floor in 45 minutes. At this rate how long does it take him to install 495 square feet.
Nina [5.8K]
50 sqft = 45 min
495 sqft = x min

495/50 is 9.9. So we know we multiplied 50 by 9.9 to change it to 495.
Do the same on the other side. 45 x 9.9 = 445.5.

It will take him 445.5 minutes, or 7.425 hours
7 0
2 years ago
Determine the x-intercept(s) of the rational function: <br> f(x) = (x ^ 2 - 16)/(x ^ 2 - 2x - 3)
elena55 [62]

Answer:

(-4,0) and (4,0)

Step-by-step explanation:

The x-intercepts occur for values of x where f(x) = 0.

f(x) = 0 when the nominator (x^{2}  - 16) = 0.

x^{2} -16 is a difference of squares,
so you can factor it as (x + 4)(x – 4)

When x = –4 or x = 4, the nominator is 0, and f(x) = 0

3 0
1 year ago
If an hourglass takes an average of 1 hour to empty a full cycle, what probability of time does it take longer than 72 minutes i
Arturiano [62]

Answer:

0.82%

Step-by-step explanation:

First find the z-score.

z = (x − μ) / σ

z = (72 − 60) / 5

z = 2.4

Use a chart or calculator to find the probability.

P(Z > 2.4) = 1 − P(Z < 2.4)

P(Z > 2.4) = 1 − 0.9918

P(Z > 2.4) = 0.0082

7 0
3 years ago
Jamie has 79 popsicles. Vincent has seven times as many as Jamie. How many popsicles do they have all together?
maxonik [38]
(79 x 7) + 79 = 632

You first have ro find the number of popsicles Vincent has and then add the number Jamie has to it. They have a combined total of 632 whichbis D) None of the above.
5 0
2 years ago
Read 2 more answers
Please answer the question in the picture!
Juli2301 [7.4K]
Eight units I'm pretty sure
3 0
3 years ago
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