If x = y and y = 2, then 3x =

Mathematics

1 answer:

USPshnik [31]3 years ago

6 0

Answer:

Step-by-step explanation:

x = y

y = 2, then 3x =3y=3*2=6

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David is a truck driver. He drives 546 miles each day. How many total miles does he drive in 12 days?

Mashutka [201]

Answer:

6552

Step-by-step explanation:

546 x 12

7 0

4 years ago

Read 2 more answers

1. Which of the following expressions is equivalent to 3 + 3×12 ÷ 4×3?

noname [10]

To find which one is equivalent to 3+3*12/4*3, we need to first evaluate and then compare to other expressions to find which one is equivalent to the expression. Using PEMDAS, we first do the multiplication and division, and then do addition.
3+3*12/4*3 = 3+36/4*3 = 3+9*3 = 3+27 = 30
Now that we know what the expression equals to, we can evaluate other equations until we find the same answer.
6*12/4*3=72/4*3=18*3=48
3+3*12/12=3+3*1=3+3=6
3+3*3*3= 3+27*3=3+81=84
3/36/4*3=9/36/4= 1/4/4 = 1/4*1/4 = 1/16
None of them are equivalent
Hope this helps

6 0

2 years ago

You have a stack of bills with $1 bills and $5 bills in it. you have 43 total bills equaling $99 how many of each type of Bill d

statuscvo [17]

Answer:

29 $1 bills and 14 $5 bills.

Step-by-step explanation:

Let $x$ be the number of $1 bills and $y$ be the number of $5 bills. With the information given, we can set up two equations:

1) $x+y=43$

2) $1x+5y=99$

There are two ways to solve it; with elimination or substitution. In this explanation, I will solve it with elimination.

To solve it with elimination, multiply the first equation by 5 to get:

$5x+5y=215$

Then, you can subtract the equation we just got by the second equation to get:

$4x=116$

Thus, $x=29$ . To find y, just substitute x for 29 in the first equation to get:

$29+y=43$ . Therefore, $y=14$ . That means that there are 29 $1 bills and 14 $5 bills. You can check by substituting those values for x and y in either of the first two equations.