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never [62]
3 years ago
6

A sample of 80 high school seniors,45% were are female were surveyed as to wheather or not they are employed outside of school ,

25 % of the boys surveyed said they are not employed how many boys are employed
Mathematics
1 answer:
Nataliya [291]3 years ago
4 0
The first thing we must do for this case is find the number of boys surveyed.
 We have then:
 (1-0.45) * (80) = 44
 We are now looking for the number of boys employed.
 We have then:
 (1-0.25) * (44) = 33
 Answer:
 
there are 33 boys employed.
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A cow gave 8 1 2 liters of milk in the morning, 3 5 liters less than this at the noon milking, and 6 3 10 liters in the evening.
Nitella [24]

Answer:

22\frac{7}{10}\ l  or 22.7\ l

Step-by-step explanation:

<u><em>The correct question is</em></u>

A cow gave 8 1\2 liters of milk in the morning, 3\5 liters less than this at the noon milking, and 6 3/10 liters in the evening. How many liters of milk did the cow give during the entire day?

we know that

The total liters of milk given by the cow during the entire day is equal to the amount in the morning plus the amount at the noon plus the amount in the evening.

Let

x -----> liters of milk given by the cow in the morning

y ----> liters of milk given by the cow at the noon

z -----> liters of milk given by the cow in the evening

T ----> total liters of milk given by the cow during the entire day

T=x+y+z

we have

x=8\frac{1}{2}\ l=\frac{8*2+1}{2}=\frac{17}{2}=\frac{85}{10}\ l

y=\frac{17}{2}-\frac{3}{5}=\frac{85-6}{10}=\frac{79}{10}\ l

z=6\frac{3}{10}\ l=\frac{6*10+3}{10}=\frac{63}{10}\ l

T=\frac{85}{10}+\frac{79}{10}+\frac{63}{10}

T=\frac{227}{10}\ l

T=22.7\ l

Convert to mixed number

22.7\ l=22+0.7=22+\frac{7}{10}=22\frac{7}{10}\ l

6 0
2 years ago
Tatiana wants to give friendship bracelets to her 323232 classmates. She already has 555 bracelets, and she can buy more bracele
VashaNatasha [74]
She needs 444 more packages exactly to have enough bracelets for everyone
8 0
3 years ago
Define a variable, then write and solve an inequality: Alex and his mother spent at least $130 while shopping for new clothes. A
OLga [1]
52 + x >130
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4 0
3 years ago
If AD is the altitude to BC, what is the slope of AD?
anygoal [31]

Answer:

Option (C)

Step-by-step explanation:

If AD is the altitude to BC, both the segments AD and BC will be perpendicular to each other.

By the property of perpendicular lines,

m_1\times m_2=-1

where m_1 is the slope of the line AD and m_2 is the slope of BC.

m_2=\frac{y_2-y_1}{x_2-x_1}

     =\frac{8+2}{3-7}

     =-\frac{5}{2}

Now from the given property,

m_1\times (-\frac{2}{5})=-1

m_1=\frac{5}{2}

Therefore, slope of altitude BC = \frac{5}{2}

Option (C) will be the answer.

3 0
3 years ago
Solve the system.<br> y= 22 – 10x + 15<br> y=-10
Yuliya22 [10]

I will try to solve your system of equations.

y=22;−10x+15y=−10

Step: Solvey=22for y:

Step: Substitute22foryin−10x+15y=−10:

−10x+15y=−10

−10x+(15)(22)=−10

−10x+330=−10(Simplify both sides of the equation)

−10x+330+−330=−10+−330(Add -330 to both sides)

−10x=−340

−10x

−10

=

−340

−10

(Divide both sides by -10)

x=34

Answer:

y=22 and x=34Answer:

Step-by-step explanation:

7 0
3 years ago
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