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Whitepunk [10]
2 years ago
5

Find each product or quotient. Express your answer in exponential form. (-x^5y^7)/y^3

Mathematics
1 answer:
Alenkasestr [34]2 years ago
4 0
Remember some laws
(ab)/c=a(b/c)
and
\frac{x^m}{x^n}=x^{m-n}
so

\frac{-x^5y^7}{y^3} =(-x^5)( \frac{y^7}{y^3})=(-x^5)(y^{7-3})=-x^5y^4
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On Sunday, Chris bought 5% of the cans from his grocery store in preparation for hurricane Sandy. If he bought 61 cans, how many
Gelneren [198K]

Answer:

  • 1220 cans

Step-by-step explanation:

Let the number of cans be x

<u>5% of x is 61, solve the equation below for x:</u>

  • x*0.05 = 61
  • x = 61/0.05
  • x = 1220 cans
7 0
3 years ago
Daisy wants to make 12 clay animals to give away as Valentines gifts. Each animal she makes uses 1/2 of a stick of clay. How muc
Free_Kalibri [48]
Answer:
Daisy will need 6 sticks of clay
4 0
2 years ago
Read 2 more answers
An English professor assigns letter grades on a test according to the following scheme. A: Top 15% of scores B: Scores below the
lisabon 2012 [21]

Answer:

59 to 66

Step-by-step explanation:

Mean test scores = u = 74.2

Standard Deviation = \sigma = 9.6

According to the given data, following is the range of grades:

Grade A: 85% to 100%

Grade B: 55% to 85%

Grade C: 19% to 55%

Grade D: 6% to 19%

Grade F: 0% to 6%

So, the grade D will be given to the students from 6% to 19% scores. We can convert these percentages to numerical limits using the z scores. First we need to to identify the corresponding z scores of these limits.

6% to 19% in decimal form would be 0.06 to 0.19. Corresponding z score for  0.06 is -1.56 and that for 0.19 is -0.88 (From the z table)

The formula for z score is:

z=\frac{x-u}{\sigma}

For z = -1.56, we get:

-1.56=\frac{x-74.2}{9.6}\\\\ x = 59

For z = -0.88, we get:

-0.88=\frac{x-74.2}{9.6}\\\\ x = 66

Therefore, a numerical limits for a D grade would be from 59 to 66 (rounded to nearest whole numbers)

7 0
3 years ago
Help on this question please!!!
OLga [1]

Answer:

Hello! Here is your answer

Step-by-step explanation:

112=4(28)

a=4b

You can only have one variable so:

Combine b to a:

a-b=84

4b-b=84

Divide both sides by 3:

3b/3=84/3

b=28

But that is not it:

Sum of both cards:

a+b

a=112

b=28

112+28=140

          = 140

I hope I was of help.  If not please let me know! Thank you! Good luck!

4 0
3 years ago
Can someone check this for me thanks so much
Zinaida [17]

Answer:

that looks like it is right

3 0
2 years ago
Read 2 more answers
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