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3 years ago

I need help with this one

Mathematics

1 answer:

olga55 [171]3 years ago

8 0

Answer:

(5,5)

Step-by-step explanation:

you subtract 1 from 6 and 2 from seven like they did in (7,9) to (6,7)

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Richard's bakery sold 7 triple-chocolate birthday cakes in six weeks for 60 dollars each. The price of each cake was five times

Soloha48 [4]

84! Is the correct answer. BRANLIEST? :)

7 0

2 years ago

I need help on this question pls

Neporo4naja [7]

56/64 = 7/8

7/8 x 120

105.

5 0

2 years ago

Ax+r=7 , solve for x

Alex777 [14]

Answer:

Step-by-step explanation:

a is 4 and 3 is x so 4+3=7

5 0

3 years ago

Read 2 more answers

Ann's watch runs 2 minutes per hour too slow. Beth's watch runs 1 minute per hour too fast. For example, if both watches were co

Elenna [48]

Answer:

8 am Monday

Step-by-step explanation:

The difference between the two watches is 2+1= 3 minutes.

It would take 60/3 = 20 hours to have a difference of 60 minutes.

From noon Sunday it would be more 20 hours the earliest time there would be a difference of one hour between the two watches' time.

12 noon + 20 hours= 8 am Monday

7 0

2 years ago

A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Houston. The stud

iris [78.8K]

Answer:

$-0.048$

Do not reject $H_0:P_1-P_2=0$

Step-by-step explanation:

From the question we are told that

Sample size $n_1=350$

Sample size $n_2=250$

Sample proportion 1 $\hat P= \frac{25}{350} =>0.07$

Sample proportion 2 $\hat P= \frac{19}{250} =>0.076$

95% confidence interval

Generally for 95% confidence level

Level of significance

$\alpha = 1-0.95=>0.05$

$\alpha /2=\frac{0.05}{2} =>0.025$

Therefore

$Z_a_/_2=1.96$

Generally the equation for confidence interval between $P_1 - P_2$ is mathematically given as

$(\hat P_1-\hat P_2)\pm Z_a_/_2\sqrt{\frac{\hat P_1(1-\hat P_1)}{n_1}+\frac{\hat P_2(1-\hat P_2)}{n_2} }$

$(0.07-0.076)\pm 1.96\sqrt{\frac{0.07(1-0.07)}{350}+\frac{0.076(1-0.076)}{250} }$

$(0.07-0.076)\pm 1.96\sqrt{4.66896*10^-^4 }$

$(-0.006)\pm 0.042$

$(-0.006)- 0.042=>-0.048$

$(-0.006)+ 0.042=>0.036$

Therefore

Confidence interval is

$-0.048$

Conclusion

Given the confidence interval has zero

Therefore do not reject $H_0:P_1-P_2=0$

6 0

2 years ago