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3 years ago

Need help with this problem

Mathematics

1 answer:

ale4655 [162]3 years ago

8 0

Answer:

it's either b or d.

Step-by-step explanation:

I'm not entirely sure, but its one of those.

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Hi... So for this homework question It says " Amy bought 2 and 1/2 gallons of paint for $60. What is the cost for 1 gallon of pa

andrey2020 [161]

I'm sorry but the solution you proposed was a bit hard to follow, so I'll just post my solution: we convert "2 and 1/2" to a single fraction:

$2+\dfrac{1}{2} = \dfrac{4}{2}+\dfrac{1}{2}=\dfrac{5}{2}$

So, we know that 5/2 gallons cost 60 dollars, which means

$\dfrac{5}{2}g=60$

To find the cost of a single gallon, we have to solve the equation for g:

$g = 60\cdot \dfrac{2}{5} = 24$

5 0

3 years ago

Basha's favorite board game has a spinner with nine congruent sections. The spinner has 2 red sections, 3 blue sections, and 4 g

kumpel [21]

Answer:

2/27

Step-by-step explanation:

Step one:

given data

Sample space

2 red sections,

3 blue sections, and

4 green sections

Sample size

2+3+4= 9

Required

The probability of Basha spinning a red on her first spin and a blue on her second spin

Step two:

On the first spin, spinning a red= 2/9

On the second spini, spinning a blue= 3/9= 1/3

Hence, The probability of Basha spinning a red on her first spin and a blue on her second spin= 2/9*1/3= 2/27

5 0

3 years ago

A fourth grade class of 28 students is given a standardized math test. The mean score of the 12 boys is 25 with a standard devia

Mashcka [7]

Answer:

The standard error for the sampling distribution is 1.323.

Step-by-step explanation:

Let <em>X</em> = scores of girls and <em>Y</em> = scores of boys.

The information provided is:

$\bar x=24\\s_{x}=4\\n_{x}=16\\\bar y=25\\s_{y}=3\\n_{y}=12$

As the population standard deviations are not known, use a pooled standard deviation to estimate the standard error of the sampling distribution.

The formula of pooled standard deviation is:

$S_{p}=\sqrt{\frac{s_{x}^{2}}{n_{x}^{2}}+\frac{s_{y}^{2}}{n_{y}^{2}}}$

Compute the standard error for the sampling distribution as follows:

$SE=\sqrt{\frac{s_{x}^{2}}{n_{x}^{2}}+\frac{s_{y}^{2}}{n_{y}^{2}}}=\sqrt{\frac{4^{2}}{16}+\frac{3^{2}}{12}}=\sqrt{1+\frac{9}{12}}=\sqrt{\frac{21}{12}}=1.323$

Thus, the standard error for the sampling distribution is 1.323.

7 0

3 years ago

Discount and Tax examples for math... HELP!!!!

never [62]

Answer:

Cathy bought a bicycle in Washington, where the sales tax rate was 6.5% of the purchase price. What was (a) the sales tax and (b) the total cost of a bicycle if the purchase price of the bicycle was $392?

8 0

3 years ago

Type the correct answer in the box.

Wittaler [7]

Answer:

k=-2ax+10a+y,

Step-by-step explanation:

8 0

3 years ago