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3 years ago

PLEASE PLEASE HELP ME WITH THIS QUESTION

Mathematics

2 answers:

4vir4ik [10]3 years ago

5 0

Step-by-step explanation:

It's a proportion.

Here is your process:

15*4=60

60/20=3

3=y

Alex Ar [27]3 years ago

3 0

Answer:

y=3

Step-by-step explanation:

y/4=15/20

1. simplify y/4 to .25y

15/20= .75

.25y=.75

2. divide .75 by .25 (.75/.25)

answer is 3

3. y=3

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7. The planet Abydos experiences drastic changes in temperature over the course of the day. On one day it reached a minimum temp

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Answer:

The temprature change was +190 degrees farenheit

Step-by-step explanation:

subtract 290-100 using absolute value

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3 years ago

Which is a true statement about the value of a credit report to lenders and borrowers?

Mars2501 [29]

Answer:

Step-by-step explanation:

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3 years ago

A store sells gift cards in preset amounts.You can purchase gift cards for $10 or $25. You have spent $285 on gift cards. Erie a

pav-90 [236]

Answer:

10x + 25y = 285

One $25 gift cards with 26, $10 gift cards.

Three $25 gift cards with 21, $10 gift cards and

Five $25 gift cards with 16, $10 gift cards.

Step-by-step explanation:

I can purchase gift cards for $10 or $25. I have spent $285 on gift cards.

If I have purchased x number of $10 gift cards and y number of $25 gift cards then the equation that models the situation in standard form will be given by

10x + 25y = 285 .......... (1)

Now, for y = 1, x = 26

For, y = 3, x = 21

For, y = 5, x = 16

So, here are the three combinations of gift cards that I could have purchased.

One $25 gift card with 26, $10 gift cards.

Three $25 gift cards with 21, $10 gift cards and

Five $25 gift cards with 16, $10 gift cards. (Answer)

8 0

3 years ago

Each algorithm is applied to a group of 52 sample problems. The new algorithm completes the sample problems with a mean time of

dem82 [27]

Answer:

Therefore we fail to reject the Null hypothesis $H_0$

Because the is no sufficient evidence to support the claim of the alternative hypothesis $H_a$

Step-by-step explanation:

From the question we are told that

Sample size $n_1 =52$

Mean time 1 $\=x_1=24.04\ hours$

Mean time 2 $\=x_2=24.52\ hours$

Standard deviation $\partial _1=5.769$

Standard deviation $\partial _2=5.556$

Level of significance 0.05

The null hypothesis is $H_o: \mu_1=\mu_2$

Alternative hypothesis $H_a: \mu_1$

Generally the test statistics is mathematically represented as

$Z= \frac{\=x_1-\=x_2}{\sqrt{\frac{\sigma_1^2}{n_1}+\frac{\sigma_2^2}{n_2}}}$

$Z= \frac{24.04-24.52}{\sqrt{\frac{5.769^2}{52}+\frac{5.5562^2}{52}}}$

$Z= -0.4321583379$

$Z= -0.43$

From Table the Z-critical value at $\alpha =0.05\ is\ -1.6449$

Therefore

Zcal> Zcritical

(-0.43)=(-1.645)

Generally we fail to reject the null hypothesis $H_0$ at $\alpha = 0.05$

Therefore we fail to reject the $H_0$

Because the is no sufficient evidence to support the claim of $H_a$

5 0

3 years ago

I need help i will give 15 points and a Brainliest if its right

d1i1m1o1n [39]

A is the answer to the question

8 0

3 years ago