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Oksi-84 [34.3K]
3 years ago
10

A 45-inch string is cut into 2 pieces. If the ratio of the longer piece to the shorter piece is 3:2, what is the length of the s

horter piece?
a. 9
b. 12
c. 18
d. 27
e. 36
Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
8 0
The answer is 30 inches. All the answers above are incorrect.
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00:00
vitfil [10]

Answer:

Step-by-step explanation:

Joseph : y = 25x + 15

Molly: y = 25x + 25

Joseph: y = 25(4)+ 15= 100+ 15= 115

Molly: y = 25(4)+ 25= 100+25= 125

8 0
3 years ago
Read 2 more answers
Over which interval is the graph of f(x) = 1/2x^2+ 5x +<br> 6 increasing?
Alinara [238K]

Answer:

Step-by-step explanation:

2-6=-4

-4÷5x=

-0.9^X

8 0
3 years ago
Layla bought a pencil for $1.25, a pen for $2.25, and three erasers for $0.45 each. She gave the cashier $10 for the items. How
snow_lady [41]

Answer:

1.25+2.25+(o.45 x 3)

=6.95

10-6.95

= got back $3.05

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Researchers conducted a study to find out if there is a difference in the use of ereaders by different age groups. randomly sele
ikadub [295]

No, there is significant difference in the use of e readers by different age groups.

Given sample 1 ( 29 years old) n_{1}=628, p_{1}=7%, sample 2( 30 years old)n_{2}=2309, p_{2}=0.11.

We have to first form hypothesis one null hypothesis and other alternate hypothesis.

H_{0}:π1-π2=0

H_{1}:π1-π2≠0

α=0.05

Difference between proportions p_{1}-p_{2}  =-0.04

p_{d}=0.07-0.11=-0.04

The pooled proportion needed to calculate standard error is:

p=(X_{1} -X_{2} )/(n_{1} +n_{2} )

=(44+254)/(628+2309)

=0.10146

The estimated standard error of difference between means is computed using the formula:

S_{p_{1} -p_{2} }=\sqrt{p(1-p)/m_{1}+p(1-p)/n_{2}  }

=\sqrt{0.101*0.899/628+0.101*0.899/2309}

=\sqrt{0.000143+0.00003}

=\sqrt{0.000173}

=0.01315

Z= Pd-(π1-π2)/S_{p_{1} -p_{2} }

=-0.04-0/0.013

=-3.0769

This test is a two tailed test so the p value for this test is calculated as (using z table)

p value:2 P(Z<-3.0769)

=2*0.002092

=0.004189

P value< significance level of 5%.

Hence there is enough evidence to show the claim that there is a significant difference in the use of e readers by different age groups.

Learn more about hypothesis at brainly.com/question/11555274

#SPJ4

Question is incomplete as it also includes:

Significance level of 5%.

4 0
2 years ago
If you place a 34-foot ladder against the top of a building and the bottom of the ladder is 25 feet from the bottom of the build
Nat2105 [25]

Answer:

59

Step-by-step explanation:

Since it says round to the nearest tenth of a foot, I might be wrong. But anyways I hope this helps!

3 0
3 years ago
Read 2 more answers
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