All categories

3 years ago

HELP!

Mathematics

1 answer:

borishaifa [10]3 years ago

3 0

Answer:

a) j+c=310; j-c=40
b) (j, c) = (175, 135)
see attached
Jose earned $175; Camden earned $135

Step-by-step explanation:

Let j and c represent Jose's and Camden's earnings, respectively.

(a) One equation can be written for the total; another for the difference:

j + c = 310 . . . . their total earnings

j - c = 40 . . . . . the difference in their earnings

(b) It is convenient to add these two equations to eliminate c:

(j +c) +(j -c) = (310) +(40)

2j = 350

j = 175

Then c can be found as ...

c = j -40 = 175 -40 = 135

The solution is (j, c) = (175, 135).

(c) Using x for j, and y for c, we can use Desmos to graph the equations. The result is attached.

(d) Jose earned $175 over the summer; Camden earned $135.

You might be interested in

Biologists were studying the proportions of cats that had spotted markings on their fur in two populations of cats, C and F. An

alexandr1967 [171]

Answer:

If the proportions of all cats with spotted markings is the same for both populations, the probability of observing a sample difference of at least 0.62 is 0.01.

Step-by-step explanation:

p-value is the probability of observing a result which is at least as extreme as we calculated in our actual workings, assuming the Null hypothesis to be true.

The calculate p-value is 0.01. In the question statement we are given that the alternate hypothesis is:

"Population Proportions are not equal"

Since, Null and Alternate Hypothesis are negations of each other, the Null Hypothesis would be:

"Population Proportions are equal"

We assume the null hypothesis to be true, perform the tests on the sample and obtain a result.

The results we obtained is:

The sample difference is 0.62

Fitting all this data, in the definition of p value tell us that:

The probability of obtaining a sample difference of atleast 0.62 is 0.01, if the population proportions are same.

This matches with the option B. Therefore, the correct answer is:

If the proportions of all cats with spotted markings is the same for both populations, the probability of observing a sample difference of at least 0.62 is 0.01.

3 0

3 years ago

About how many grams of a 500 g sample of technetium-99 is left after 2 days

kogti [31]

Answer:

Step-by-step explanation:

1.95 g

7 0

3 years ago

What does permimeter mean

kaheart [24]

Total distance around a shape

8 0

2 years ago

Read 2 more answers

Dan earns $42.75 per month working as a tutor. He worked as a tutor for 4 months. He also earned $52.45 walking dogs in the neig

hjlf

Answer:

step 3

Step-by-step explanation:

in step 3, he wrote that the sum of 171+ 52.45-18.50 was 241.95 when it is 199.95

3 0

2 years ago

Males and females (ages 13–18) were surveyed to choose a favorite free-time activity: playing computer games, listening to music

liq [111]

Gender | Games| Music | Movies/TV |
Female   |   4         | 20      |   16
Male       | 15         | 12      |   13
Total       | 19         | 32     |   29

Something like that :)

8 0

3 years ago

Read 2 more answers