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aivan3 [116]
3 years ago
7

A recipe for bread calls for 5 5/6 cups of flour. Jessica accidentally put in 9 7/10 cups. How many extra cups did she put in?

Mathematics
1 answer:
trapecia [35]3 years ago
3 0

3 13/15

97/10 - 35/6

find the LCM of the denominators =30

291 -175 = <u>1</u><u>1</u><u>6</u>

30 30

=<u>5</u><u>8</u> or 3.866666

15

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find the perimeter of an isosceles triangle with side lengths of 5+x, 5+x, and xy. Write in simplest form.
Zinaida [17]
<h3>Answer: perimeter = 10+2x+xy</h3>

To get the perimeter, you add up all the outer sides

side1+side2+side3 = (5+x)+(5+x)+(xy) = 10+2x+xy

The like terms 5 and 5 add to 10. The other pair of like terms x and x add to 2x. There isn't anything to pair with xy, so we leave it as is.

3 0
2 years ago
Twenty five heat lamps are connected in a greenhouse so, that when one lamp fails, another takes over immediately (only one lamp
olga55 [171]

Answer:

P = 0.006

Step-by-step explanation:

Given

n = 25 Lamps

each with mean lifetime of 50 hours and standard deviation (SD) of 4 hours

Find probability that the lamp will be burning at end of 1300 hours period.

As we are not given that exact lamp, it means we have to find the probability where any of the lamp burning at the end of 1300 hours, So we have

Suppose i represents lamps

P (∑i from 1 to 25 (X_i > 1300)) = 1300

= P(X^{'}> \frac{1300}{25})                  where X^{'} represents mean time of a single lamp

= P (Z> \frac{52-50}{\frac{1}{\sqrt{25}}})                Z is the standard normal distribution which can be found by using the formula

Z = Mean Time (X^{'}) - Life time of each Lamp (50 hours)/ (SD/\sqrt{n})

Z = (52-50)/(4/\sqrt{25}) = 2.5

Now, P(Z>2.5) = 0.006 using the standard normal distribution table

Probability that a lamp will be burning at the end of 1300 hours period is 0.006

4 0
3 years ago
Maria is comparing the prices of two window cleaning companies. Company A charges $6 per window and an additional $12 as service
Pani-rosa [81]
Part A: 6w + 12 = 5w + 15

Part B: 6(8) + 12 = 5(8) + 15
48 + 12 = 40 + 15
60 = 55 = Company B equals $55 which is less than $60

Part C: $5 is saved because of the amount of money.
Hope this helps :)

8 0
3 years ago
Help please first with the right answer will be marked brainlyest
andre [41]
I believe this is correct

5 0
3 years ago
Read 2 more answers
-9x^5 + 36x^4 + 189x^3 in factored form
Alex73 [517]

Answer:

-9x^5(x+3)(x-7)

Step-by-step explanation:

factor out -9x^3 from the expression

8 0
3 years ago
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