your marksmanship score are 6 and 10 on two test . if you want average 9 on the tests , waht must your third score be?

Answer:

<em>Mistake in question, if there were 25 heads, then there are</em>

<em>13 chickens, 5 cows, 7 horses</em>

Step-by-step explanation:

<u>System of Equations</u>

Let's call x=number of chickens, y=number of cows, z=number of horses

We know Jack has two more horses than cows, so

z=y+2

We also know there are 24 heads, one per animal, so

x+y+z=24

Combining with the previous condition:

x+y+y+2=24

x+2y=22

We finally know there are 74 feet, two for each chicken and four for each cow or horse:

2x+4y+4z=74

Combining with the first condition

2x+4y+4(y+2)=74

2x+4y+4y+8=74

2x+8y=66

Dividing by 2

x+4y=33

Let's bring the first equation here

x+2y=22

Subtracting both

2y=11

It would give us a decimal number of cows

y=5.5

And a decimal number of horses

z=7.5

And a integer number of chickens

x=22-11=11

If the number of heads would have been 25, our problem will be correctly stated and the answer would be

13 chickens, 5 cows, 7 horses

Answer:

Option B.

Step-by-step explanation:

If equation of a line is y=mx+c, then m is the slope of line.

The given equation is

Here, slope of line is .

We need to find the equation of line that is parallel to given equation and passes through (–2,–2).

We know that, slope of parallel lines are same. So, slope of required line is . So, equation of line is

Divide both sides by 3.

Therefore, the correct option is B.

Answer:

6

Step-by-step explanation:

Answer is there the value of this

Answer:

My brain hurt

Step-by-step explanation:

Answer: 234

Step-by-step explanation:

If there are 130 nonfiction books, then there are 234 fiction books