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3 years ago

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A local public school encourages, but does not require, students to wear uniforms. The principal of the school compares the gr

ade point averages of students at this school who wear uniforms with the GPAs of those who do not wear uniforms to determine whether those wearing uniforms tend to have higher GPAs.

1 answer:

Allisa [31]3 years ago

4 0

Answer:

This is an observational study. The principal do not actually randomly assign students to either wear or not wear uniforms. Random assignment is essential to conducting a controlled experiment.

Step-by-step explanation:

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A sporting goods store sells right-handed and left-handed baseball gloves. In one month, 12 gloves were sold for a total revenue

stepladder [879]

Answer:

$9$ right-handed gloves and $3$ left-handed gloves were sold.

Step-by-step explanation:

Given: In one month, $12$ gloves were sold for a total revenue of $\$561$ .

right-handed gloves cost $\$45$ and left-handed gloves cost $\$52$ .

To find: How much of each type of gloves did they sell?

Solution: Let they sell $x$ right-handed gloves, and $y$ left-handed gloves.

Now, cost of each right-handed gloves $=\$45$

cost of each left-handed gloves $=\$52$

Total revenue $=\$561$

So, we get

$45x+52y=561\:\:\:...(i)$

Also, in a month $12$ gloves were sold.

So, we get

$x+y=12\:\:\:...(ii)$

Now, from $(ii)$ we get, $x=12-y$ .

Putting $x=12-y$ in equation $(i)$ , we get

$45(12-y)+52y=561$

$\implies 540-45y+52y=561$

$\implies7y=561-540$

$\implies7y=21$

$\implies y=\frac{21}{7}$

$\implies y=3$

Now, putting $y=3$ in equation $(ii)$ , we get

$x+3=12$

$\implies x=12-3$

$\implies x=9$

Hence, $9$ right-handed gloves and $3$ left-handed gloves were sold.

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3 years ago

Translate the word phrase into a variable expression.

UNO [17]

The answer is b x/3-8

5 0

3 years ago

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dolphi86 [110]

Answer:

11

Step-by-step explanation:

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2 years ago

Help me please! Did I do this right?

MrMuchimi

Answer:

no its A and B

Step-by-step explanation:

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2 years ago

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Number three . Show work plz

nordsb [41]

13/15 - 1/3 Find a common denominator
1/3 x 5= 5/15
13/15 - 5/15 = 8/15

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3 years ago

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