1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Leno4ka [110]
3 years ago
14

Janet has $120. If she saves $20 per week, in how many days will she have $500? *

Mathematics
1 answer:
harkovskaia [24]3 years ago
5 0

Answer:

19 weeks

Step-by-step explanation:

Make an equation

120+20x=500

Subtract 120 on both sides

20x=380

Divide by 20 on both sides

x=19

Hope this helps!

You might be interested in
PLEASE HELP! &lt;3<br> What is the slope of the line?
GrogVix [38]

Answer:

0

Step-by-step explanation:

The slope formula is (change in y)/(change in x)

since the numerator (change in y) is 0, the slope will be 0

5 0
2 years ago
A new car battery is sold with a two-year warranty whereby the owner gets the battery replaced free of cost if it breaks down du
Mariana [72]

Answer:

4.01% probability that the battery will break down during the warranty period

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

\mu = 45, \sigma = 12

a. What is the probability that the battery will break down during the warranty period

Warranty of 2 years = 24 months. So this is the pvalue of Z when X = 24.

Z = \frac{X - \mu}{\sigma}

Z = \frac{24 - 45}{12}

Z = -1.75

Z = -1.75 has a pvalue of 0.0401

4.01% probability that the battery will break down during the warranty period

7 0
3 years ago
8u/u^2-18u+81 subtract 72/u^2-18u+81
Karo-lina-s [1.5K]
Your question is:
\frac{8u}{u^2-18u+81} -\frac{72}{u^2-18u+81}
Then, the above formula equate:

\frac{8u-72}{u^2-18u+81}
Factor out 8 from the numerator we get:
\frac{u-9}{u^2-18u+81}
Factorization of the denominator:
\frac{u-9}{(u-9)^2}
Simplifying the numerator and the denominator by (u-9) we get:
\frac{1}{(u-9)}
6 0
3 years ago
-5(2x − 2) - (7x + 8)<br> What expression is equivalent to this
shusha [124]

Answer:

Step-by-step explanation:

first step is to multiply

-5(2x-2)=-10x+10

-10x+10-7x-8=-17x+2

5 0
2 years ago
Read 2 more answers
HELPPPPP!!! The data shows the weights of babies, in ounces, born at a local hospital in the month of January. 112, 118, 120, 67
lorasvet [3.4K]

Answer:

6

Step-by-step explanation:

The outlier is 67.

The mean with the outlier is: 115

(112+ 118 + 120 +67 + 128 + 119 + 121 + 124 + 126) ÷ 9

The mean without he outlier is: 121

(112+ 118 + 120 + 128 + 119 + 121 + 124 + 126) ÷ 8

So, 121 - 115 = 6

3 0
3 years ago
Read 2 more answers
Other questions:
  • The hardcover version of a book weighs twice as much as it's paperback version. The hardcover book and the paperback together we
    11·1 answer
  • Can you help me what is 8242/68
    11·2 answers
  • Seven wholes times 2 fifteenths
    15·1 answer
  • Jon’s time for running the mile in gym class is 9.2 minutes. Jacky’s time is 9.18 minutes. Who ran the mile in less time?
    15·1 answer
  • The perimeter of a square is 44. Find the length of a diagonal.
    11·2 answers
  • Suppose that scores on an aptitude test are normally distributed with a mean of 100 and a standard deviation of 4.6. Scores on a
    12·1 answer
  • An automobile manufacturer would like to know what proportion of its customers are not satisfied with the service provided by th
    7·1 answer
  • If &lt; A and &lt; B are supplementary, and &lt; A = 3x - 9 degrees, and &lt; B = 2x + 14 degrees, find x.
    15·1 answer
  • HELLLLLLLLLLLLLPPPPPPPPPP
    6·1 answer
  • Oakville is a fungal disease that infects oak trees scientists have discovered that a single tree in a small forest is infected
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!