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Pepsi [2]
2 years ago
12

What expression can be used to represent the phrase five times amount of pebbles

Mathematics
1 answer:
emmasim [6.3K]2 years ago
8 0

Answer:

5p

Step-by-step explanation:

If we use p to represent pebbles, 5 times the amount of pebbles would be 5p

Hope this helps

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What is the best first step for solving the given system using substitution while avoiding fractions -9x+4y=10 -9x+3y=3
Sever21 [200]

Answer:

Solve for x in the first equation. ⇒ the first answer

Step-by-step explanation:

* Lets study how to solve the system of the equation using

 the substitution method

- The first equation is ax + by = c

- The second equation is dx + ey = f

* To chose the first step

- Solve for x or y depends on the integer answer

EX: ax = c - by ⇒ x = c/a - (b/a)y

      b/a = integer , c/a = integer ⇒ best choice

- If not solve for next variable

EX: by = c - ax ⇒ y = c/b - (a/b)y

      a/b = integer , c/b = integer ⇒ best choice

- If not repeat with the second equation to find the best choice

* Lets check our equations:

∵ -9x + 4y = 10 ⇒ (1)

∵ -9x + 3y = 3 ⇒ (2)

* If we start with the first equation and solve for x

∵ -9x = 10 - 4y ⇒ (2)

- It will be difficult if we divide by -9, but the second equation

 has -9x, so we will solve of -9x not for x and substitute the value

 of -9x in the second equation

* Substitute (3) in (2)

∴ 10 - 4y + 3y = 3 ⇒ collect the like terms

∴ -y = -7 ⇒ y = 7

substitute the value of in (3)

∴ -9x = 10 - 4(7) ⇒ -9x = -18 ⇒ ÷ -9 in both sides

∴ x = 3

∴ The best choice to avoid fraction is:

  Solve for x in the first equation.

7 0
3 years ago
Read 2 more answers
Simplify:<br> 8(v+w) - 7(v+2w)
Liula [17]
First you need to distribute. when you do this you get (8v+8w)-(7v+14w) then you get like terms together, but don't forget that everything in (7v+14w) is negative. when you group like terms together you get (8v-7v)+(8w-14w) simplify and you get v-6w
4 0
3 years ago
Read 2 more answers
write an expression that describes the number of points scored on touchdowns t and points after touchdowns p by one team in a ga
Len [333]
A touchdown is scored 6 points for each touchdown and the points made after a touchdown is scored 2 points each. We are given the following variables:

t = number of touchdowns
p = number of points after a touchdown

Total score = 6t + 2p

Where 6 times t is the total score given by the number of touchdowns multiplied by 6 points, the same goes for the expression 2p. 
6 0
2 years ago
Tim scored 35, 38, and 36 points on three tests. How many points should he get on the fourth test to get an average score of 40?
My name is Ann [436]
I think 51 because if you were to do it reverse then it would be 40x4=160 then -35-36-38 it would be 51.
4 0
3 years ago
Two interior angles of a triangle each measure 34°. What is the measure of the third interior angle?
lana [24]

Answer:

D. 112

Step-by-step explanation:

Since we know that a triangle totals 180 degrees, we can easily figure out the third angle. Since each measure 34 degrees, simply multiply by 2. You get 68 degrees. Then you do 180-68 to get 112.

4 0
3 years ago
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