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Usimov [2.4K]
3 years ago
11

Sarah's age is four more than twice her brothers age. Write two equivalent algebraic equations that can be used to find their ag

es.
Mathematics
1 answer:
marissa [1.9K]3 years ago
3 0

Answer:

Step-by-step explanation:

Let her brother's age be x

Sarah is 2x + 4

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621/87 can anybody help me
Ilia_Sergeevich [38]

Answer:

621/87=7.13793103448

Step-by-step explanation:

I divided it and got this answer

5 0
3 years ago
Read 2 more answers
What is the volume of a right circular cylinder with a radius of 5 cm and a height of 12 cm?
dexar [7]

Answer:

Answer C

Step-by-step explanation:

Formula

Volume = pi * r^2 * h

Givens

  • r = 5 cm
  • h = 12  cm

Solution

  • V = pi * 5^2 * 12
  • V = pi * 25 * 12
  • V = 300 pi

Answer = C

8 0
3 years ago
Help me out with number 8!!! I’m confused and I need this by tomorrow HELP PLEASE
ivann1987 [24]
We can use elimination for these set of systems.
First, we need to set up our variables.
Belts=b
Hats=h
Now, the situation is 6 belts and 8 hats for $140. The situation after is 9 belts and 6 hats for $132.
Let’s set up our system of equations.
6b+8h=140
9b+6h=132
We need to eliminate a variable. Since b has coefficients of 6 and 9, we can easily eliminate b by multiplying the top equation by 3 and the bottom by -2.
18b+24h=420
-18b-12h=-264
Now let’s add.
12h=156
Let’s divide to get h by itself.
156/12=13=h
So a hat costs $13. We need to put in 13 for one of the equations so we can find the cost of a belt.
9b+6(13)=132
9b+78=132
We need b by itself.
9b=54
54/9=6
Belts are $6
We can also use the first equation to check our answers.
6(6)+8(13)
36+104
140.
So, the price of a belt is $6 while the price of a hat is $13.
































3 0
3 years ago
Vehicle a averages 14 miles per gallon of gasoline, and vehicle b averages 36 miles per gallon of gasoline. at these rates, how
Dima020 [189]
72 or 28 is the answer i hope this helped you :)
3 0
3 years ago
9x-3y=27<br> -6x+9y=24<br> idek what this is but i need help
lbvjy [14]

Answer:

Step-by-step explanation:

if x=6 y=9 that is answer. I just know, but think. BOI

8 0
3 years ago
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