The product of 3 and a number is 12 more than the sum of the number and 26. What is the number?
Answers
Answer 1
Answer:
The product of three and a number (3n) is 12 more than (=12 +) the sum of the number and 26 (n + 26). Put all of those together.
2n = 12 + n + 26 Combine like terms. (12 + 26)
2n = 28 + n Subtract to get the variables together. (2n - n)
n = 28
2n = 12 + n + 26 Combine like terms. (12 + 26)
2n = 28 + n Subtract to get the variables together. (2n - n)
n = 28
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Answers
1)
Solve using elimination
Multiply the first equation by 2 and the second by 5 so you can figure out x
10x-6y=-18
10x-25y=20
Subtract the two equations
19y=-28
y=-2
Plug y into the equation and you get x=-3
(-3, -2)
2. C Just model the equation
3. B Again, it's all about turning the word problem into equations
4. D. Use substitution and plug the x into the first equation.
5.
Multiply the whole first equation by 2.
You can see that because 4*2=8
8x+10y=16
Hope this helps.
Solve using elimination
Multiply the first equation by 2 and the second by 5 so you can figure out x
10x-6y=-18
10x-25y=20
Subtract the two equations
19y=-28
y=-2
Plug y into the equation and you get x=-3
(-3, -2)
2. C Just model the equation
3. B Again, it's all about turning the word problem into equations
4. D. Use substitution and plug the x into the first equation.
5.
Multiply the whole first equation by 2.
You can see that because 4*2=8
8x+10y=16
Hope this helps.
coinciedent equations are the same equations but indifferent forms
example
2x+3y=2 is coincident with 4x+6=4 (multilied by 2)
so we have
4x+5y=8
next one was have
8x
we see that 4 times 2=8 so we just double the numbers
5 times 2=10
8 times 2=16
answer is 8x+10y=16
missing numbers are 10 and 16
subsitution meathod
absicalyy since you have x=y+2, then subsitue y+2 for x in the equaiton x+y=6 so
(y+2)+y=6
there fro the answer is D
d=desmond
g=george
d is 3 less than g
d=-3+g
d=g-3
combinded scores equals 187
d+g=187
the equations are
d=g-3 and d+g=187
the answer is B
child tikcet is 2 dollars so number of children times cost per child=cost
c times 2=cost=2c
adult tickets are same but differenc cost
6 times a=6a
so number of adults+number of kids=total number of people
c+a=38
cost of adults+cost of kids=total cost
2c+6a=148
the equations are
c+a=38 and 2c+6a=148
the answer is A
the solution is in the form (x,y)
so solv for x and y
5x-3y=-9
2x-5y=4
multily the first equation by -2 and the second equaiton by 5
-10x+6y=18
10x-25y=20
add them together
-10x+6y=18
10x-25y=20 +
0x-19y=38
-19y=38
divide both sides by -19
y=-2
subsitute
5x-3y=-9
5x-3(-2)=-9
5x+6=-9
subtract 6 from both sides
5x=-15
dvide by 5
x=-3
x=-3
y=-2
solution is
(-3,-2)
ANSWERS
missing numbers are 10 and 16
D
B
A
(-3,-2)
example
2x+3y=2 is coincident with 4x+6=4 (multilied by 2)
so we have
4x+5y=8
next one was have
8x
we see that 4 times 2=8 so we just double the numbers
5 times 2=10
8 times 2=16
answer is 8x+10y=16
missing numbers are 10 and 16
subsitution meathod
absicalyy since you have x=y+2, then subsitue y+2 for x in the equaiton x+y=6 so
(y+2)+y=6
there fro the answer is D
d=desmond
g=george
d is 3 less than g
d=-3+g
d=g-3
combinded scores equals 187
d+g=187
the equations are
d=g-3 and d+g=187
the answer is B
child tikcet is 2 dollars so number of children times cost per child=cost
c times 2=cost=2c
adult tickets are same but differenc cost
6 times a=6a
so number of adults+number of kids=total number of people
c+a=38
cost of adults+cost of kids=total cost
2c+6a=148
the equations are
c+a=38 and 2c+6a=148
the answer is A
the solution is in the form (x,y)
so solv for x and y
5x-3y=-9
2x-5y=4
multily the first equation by -2 and the second equaiton by 5
-10x+6y=18
10x-25y=20
add them together
-10x+6y=18
10x-25y=20 +
0x-19y=38
-19y=38
divide both sides by -19
y=-2
subsitute
5x-3y=-9
5x-3(-2)=-9
5x+6=-9
subtract 6 from both sides
5x=-15
dvide by 5
x=-3
x=-3
y=-2
solution is
(-3,-2)
ANSWERS
missing numbers are 10 and 16
D
B
A
(-3,-2)
Answers
That is known as taxes.
Answers
the only thing you should do is to multiply 7 by 2x and 10.
so you will have: (7*2x) + (7*10) = 14x + 70 :)))
i hope this is helpful
have a nice day
so you will have: (7*2x) + (7*10) = 14x + 70 :)))
i hope this is helpful
have a nice day
Answers
To change a fraction to a decimal, simply divide the numerator by the denominator. The numerator is the top part of the fraction, while the denominator is the bottom part of the fraction.
4 ÷ 5 = 0.8
Thus,
as a decimal would be 0.8
4 ÷ 5 = 0.8
Thus,
Divide the top number with the bottom number. And it will become a decimal. So 4 / 5 =0.8
Answers
Let x be the number of times that Michael rode on the roller coaster and let y be the number of times that he rode on the boat, then: x + y = 10 [because he went on the two rides a total of 10 times], and 4x + 3y = 37 [because a ride on a roller coaster costs 4 tickets and the boat ride costs 3 tickets and he spent a total of 37 tickets] From the first equation, 4x + 4y = 40 subtracting the second equation from the third equation gives: y = 3, and from the first equation x = 10 - y = 10 - 3 = 7 Therefore, Michael rode on the roller coaster 7 times and on the boat 3 times.
The answer is C. Hope this helps! :D
Answers
it is 905,000 in a starndard form
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