3 years ago

It takes Rebekka 1/2 hour to jog 1 1/4 miles.

Mathematics

2 answers:

MaRussiya [10]3 years ago

6 0

D because we have divide to find the unit rate.

Oduvanchick [21]3 years ago

5 0

D because it correct and I’m smart I think

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A lawnmower was purchased for rupees 1100 and rupees 50 were paid as transportation charges. It was sold at a 14% profit. Find i

nevsk [136]

Answer: 161 rupees.

Step-by-step explanation:

Use a percentage Calculator on the internet to find the solution.

1100 + 50

1150

(put into calculator)

7 0

4 years ago

Essential: Solve the proportions<br> step by step

vazorg [7]

Answer:

The value of r= $\frac{-106}{47}$

The value of x= $\frac{83}{32}$

Step-by-step explanation:

Given that,

A) $\frac{2r-2}{7r+10} = \frac{9}{8}$

Now,

$\frac{2r-2}{7r+10} = \frac{9}{8}$

8(2r-2)=9(7r+10)

16r-16=63r+90

-16-90=63r-16r

-(16+90)=47r

-106=47r

r= $\frac{-106}{47}$

B) $\frac{x+4}{9} = \frac{3(x-2)-1}{5}$

Now,

$\frac{x+4}{9} = \frac{3(x-2)-1}{5}$

5(x+5)=9[3(x-2)-1]

5x+25=9[3x-6-1]

5x+25=9[3x-7]

5x+25=27x-63

25+63=27x+5x

83=32x

x= $\frac{83}{32}$

6 0

4 years ago

it costs $2.48 for a 16 ounce jar of peanut butter and $5.44 for a 40 ounce jar. which jar is the better buy

gogolik [260]

Second one, please mark branliest

7 0

3 years ago

What number should be placed in the box to help complete the division calculation?

Anarel [89]

344 should be placed in the box

3 0

4 years ago

Suppose that the ages of members in a large billiards league have a known standard deviation of σ = 12 σ=12sigma, equals, 12 yea

asambeis [7]

Answer:

$n\geq 23$

Step-by-step explanation:

-For a known standard deviation, the sample size for a desired margin of error is calculated using the formula:

$n\geq (\frac{z\sigma}{ME})^2$

Where:

$\sigma$ is the standard deviation
$ME$ is the desired margin of error.

We substitute our given values to calculate the sample size:

$n\geq (\frac{z\sigma}{ME})^2\\\\\geq (\frac{1.96\times 12}{5})^2\\\\\geq 22.13\approx23$

Hence, the smallest desired sample size is 23

3 0

3 years ago