The directions say "solve each equation."
question 1. - 3/4y + 1/4 = 1/2
question 2. 0.4 { a + 2 } = 2
2007-01-30 14:24:20 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
-3/4 y + 1/4 = 1/2
3/4y = -(1/2 - 1/4)
3/4 y = -1/4
3y = -1
y = -1/3
0.4a + 0.4(2) = 2
0.4a = 2 - 0.8
0.4a = 1.2
a = 3
2007-01-30 14:30:27 · answer #1 · answered by car of boat 4 · 0⤊ 0⤋
Solve means to find the value of y (in this case) which satisfies the equation:
1)
- 3/4y + 1/4 = 1/2
-3/4y = 1/4
y = -1/3
2)
0.4 { a + 2 } = 2
a + 2 = 5
a = 3
2007-01-30 22:30:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋
question 1.
- 3/4y + 1/4 = 1/2
-3/4y = 1/2 - 1/4
lcf(4, 2) = 4
-3/4y = 2/4 - 1/4
-3y = 1
y = -1/3
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question 2.
0.4 { a + 2 } = 2
0.4a + 0.8 = 2
0.4a = 2 - 0.8
0.4a = 1.2
a = 3
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2007-01-30 22:43:28 · answer #3 · answered by aeiou 7 · 0⤊ 0⤋
to solve each question, you have to find out the answer for the variable
the variable is the term that is unknown
question 1:
-3/4y + 1/4 = 1/2
first you move the 1/4 to the other side..when it goes to the other side, its a MINUS 1/4
-3/4y = 1/2 - 1/4
-3/4y = 1/4
now you divide both sides by -3/4 to isolate for y
y = (1/4)/(-3/4)
therefore, y = -1/3
question 2:
same deal as question 1
0.4(a + 2) = 2
divide both sides by 0.4
(a + 2) = 5
a = 5 - 2
therefore, a = 3
:)
2007-01-30 22:29:58 · answer #4 · answered by Bored 2 · 0⤊ 0⤋
1) Subtract 1/4 from both sides.
-3/4y=1/4 >>> Divide by -3/4, or multiply by -4/3, same thing.
y=-3/12 = -1/4
2) Multiply by 0.4, or 4/10
a+2 = 8/10 = 4/5
Subtract 2 from both sides.
a= (4/5) - 2 = -6/5 = -1.2
2007-01-30 22:30:29 · answer #5 · answered by Anonymous · 0⤊ 0⤋
1.-3/4y+1/4=1/2
=>-3/4y+1/4-1/4=1/2-1/4 [deducting 1/4 from both sides]
=>-3/4y=1/4
=>(-3/4y)/-3/4=1/4/-3/4
[dividing both sides by- 3/4]
=>y=-1/3
2.0.4(a+2)=2
=>10*0.4(a+2)=10*2 [multiplying both sides by 10]
=>4(a+2)=20
=>4a+8=20
=>4a+8-8=20-8 [subtracting 8 from both sides]
=>4a=12
=>4a/4=12/4 [dividing both sides by 4]
=>a=3
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2007-01-30 22:32:56 · answer #6 · answered by alpha 7 · 0⤊ 0⤋
3/4y + 1/4 = 1/2
1/2y = 1/4
1/2y(2) = 1/4(2)
y = 1/2
0.4(a + 2) = 2
0.4a + 28/10 = 2
0.4a = --0.8
a = --0.32
i think thats it
i did it in my head
2007-01-30 22:36:45 · answer #7 · answered by st jimmy 2 · 0⤊ 0⤋
3/4y + 1/4 = 1/2
3/4y = 1/4
y = 1/4 / 3/4
y = .333...
0.4(a+2) = 2
.4a + .8 = 2
.4a = 1.2
a = 1.2/.4
a = 3
do you get this?
2007-01-30 22:28:39 · answer #8 · answered by the_akbash 1 · 0⤊ 0⤋
-3/4y+1/4=1/2
-3/4y=1/2-1/4
-3/4y=-3/4
2007-01-30 22:31:21 · answer #9 · answered by coolvolcano 1 · 0⤊ 0⤋
1.)
(-3/4)y + (1/4) = (1/2)
Multiply everything by 4
-3y + 1 = 2
-3y = 1
y = (-1/3)
------------------------------
2.)
.4(a + 2) = 2
a + 2 = 2/(.4)
a + 2 = 20/4
a + 2 = 5
a = 3
2007-01-30 23:08:16 · answer #10 · answered by Sherman81 6 · 0⤊ 0⤋