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Kruka [31]
4 years ago
13

which of the following is equal to the rational expression when x does not equal -1 or -7 (x+1)(x-1)/(x+7)(x+1) A. x+7/x-1 B.x+1

/x+7 C.x-1/x+7
Mathematics
1 answer:
liq [111]4 years ago
3 0

Answer:

7

Step-by-step explanation:

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a farmer has enough grain to feed 60 cattle for 10 days for how many days will the grain last when there are 30 cattle
azamat

Hi!

The simple explanation is just, since there are half as many cows, then the grain will last two times more.

But here's why. How many times are you going to be feeding the cattle, over 10 days, if you feed them once per day? 60 * 10 = 600, so 600 times.

If you're still feeding them once per day, and there are 30 cows instead, then find how many times 30 goes into 600. 600 / 30 = 20 days. That's a method you can use, no matter what, even if it's, say 50 cattle. You would still get an answer (if it was 50, 600 / 50 = 12, so 12 days).

Hope this helped!

8 0
3 years ago
Read 2 more answers
The length of triangle base is 26. A line, which is parallel to the base divides the triangle into two equal area parts. Find th
Yanka [14]

Answer:

Step-by-step explanation:

It is given that the length of triangle base is 26, then let ABC  be the triangle and BC be the base of the triangle=26.Let DE be the parallel line to the base that divides triangle ABC into two equal area parts.

Now, Let AD=a, DB=b, DE=c, AE=d and EC=e, then

Since,  triangle ABC is similar to triangle ADE, thus using basic proportions, we get

\frac{AD}{AB}=\frac{DE}{BC}=\frac{AE}{AC}

\frac{AD}{AD+DB}=\frac{DE}{BC}=\frac{AE}{AE+EC}

\frac{a}{a+b}=\frac{c}{26}=\frac{d}{d+e}

Taking the first two equalities,we get

\frac{a}{a+b}=\frac{c}{26}

c=\frac{26a}{a+b}

Thus, the length of the segment between triangle legs is \frac{26a}{a+b}

7 0
4 years ago
-9+-5x please help meee cause I'm not Finna fail
Westkost [7]

Answer:

-9-5x

Step-by-step explanation:

they aren't the same because of the variable on 5x. You can simplify the problem to -9-5x but that's about it unless it equals something.

7 0
4 years ago
HELP ME PLEASE!!!
xz_007 [3.2K]

Answer:

3/32

Step-by-step explanation:

6 0
3 years ago
What is the average rate of change of the function f(x)=5(2)^x from x = 1 to x = 5?
Mila [183]
Average rate of change refers to the slope of a function/equation. 
To solve this, plug in for both x values and calculate the average, or mean. 

x = 1 
f(1) = 5(2)^1 
      = 5(2) 
      = 10

x = 5 
f(5) = 5(2)^5
      = 5(32) 
      = 160

Now, you calculate the average: 
10 + 160 = 170 
Divide by 2 and you get 85.



5 0
3 years ago
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