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BlackZzzverrR [31]
3 years ago
10

the soccer club is selling tshirts and washing cars to raise money for a summer trip. last week, the club raised $292.50 by sell

ing 15 tshirts and washing 12 cars. this week, it raised $747.50 by selling 45 tshirts and washing 10 cars
Mathematics
1 answer:
Delvig [45]3 years ago
6 0

The equation can be made by:

Letting x be the price of each tshirt sold

Y be the cost of washing cars

So the equation 1:

292.50 = 15x + 12y

Then the equation 2 is for this week:

<span>747.50 = 45x + 10y</span>

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In the standard Normal distribution, which z-score represents the 99th percentile?
nydimaria [60]

The Z- score representing the 99th percentile is given by 2.33

Problems of commonly distributed samples can be solved using the z-score formula.

For a set with a standard deviation, the z-score scale X is provided by:

Z = ( x- mean )/ standard deviation

Z-score measures how many standard deviations are derived from the description. 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 scale is less than X, that is, the X percentage. Subtract 1 with p-value, we get the chance that the average value is greater than X.

To Find the z-result corresponding to P99, 99 percent of the normal distribution curve.

This is the Z value where X has a p-value of 0.99. This is between 2.32 and 2.33, so the answer is Z = 2.33

For more information regarding normal distribution, visit brainly.com/question/12691636

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3 0
2 years ago
Costs 21.36 +1.17x=73
Ierofanga [76]

Answer:

what are we actually solving for?....

anyways I had a suggestion ion know if it's right or wrong....

<em>Isolate</em><em> </em><em>the</em><em> </em><em>variable</em><em> </em><em>by</em><em> </em><em>diving</em><em> </em><em>each</em><em> </em><em>side</em><em> </em><em>by</em><em> </em><em>factor</em><em> </em><em>that</em><em> </em><em>don't</em><em> </em><em>contain</em><em> </em><em>the</em><em> </em><em>vari</em><em>able</em><em>.</em>

<em>Therefore</em><em> </em><em>x</em><em>=</em><em>7</em><em>.</em><em>2</em>

8 0
3 years ago
Puppy B weighs 8 pounds which is about 75% of its adult weight what will be the adult weight of puppy B
seropon [69]

Answer:

Step-by-step explanation:

Let x be the adult weight of puppy B

75% of x =8 pounds

\frac{75}{100}*x=8\\\\x=\frac{8*100}{75}\\\\x=\frac{8*4}{3}\\\\=\frac{32}{3}\\\\x=10.67pounds

5 0
3 years ago
Please help me ill give brainlist
alexgriva [62]
19 every time it goes up
8 0
2 years ago
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Between the time Iko woke up and lunchtime,the temperature rose by 11°.Then by the time he went to bed,the temperature dropped b
natali 33 [55]

Answer: Cannot be done

Step-by-step explanation:

This is impossible as there is no previous information and we don’t have a formula.

7 0
3 years ago
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