Answer:
<u>w = P/2 - l</u>
Step-by-step explanation:
P = 2(l + w)
P/2 = l + w
<u>w = P/2 - l</u>
Answer:
x=3, y=0.8
Step-by-step explanation:
8x+5y=28
4x+5y=16
Subtract the second simultaneous equation from the first.
You are left with: 4x=12
12/4=3
x=3
Substitute this back into one of the equations.
8(3)+5y=28
8*3=24
28-24=4
4=5y
4/5=0.8
y=0.8
Answer:
17:7
Step-by-step explanation:
The first jar is 2/3 water, and the second jar is 3/4 water. Since the jars are equal volume, the resulting mixture will be the average.
(2/3 + 3/4) / 2
(8/12 + 9/12) / 2
(17/12) / 2
17/24
If the jar is divided into 24 parts, 17 parts are water, and the remaining 7 parts are vinegar. So the ratio is 17:7.
B. They intersect at one point
Answer:
T1he values for x and y of the equations is y = 11, and x = -19/5.
Step-by-step explanation:
To solve this question, we need to rearrange the expression:
5x+4y=25 - (5x+2y=3)
Look, if we subtract one equation to the other, then:
5x+4y=25 [1]
-(5x+2y=3) [2]
Which is the same as:
5x+4y=25
-5x-2y=-3
Subtract them:
5x+4y=25
-5x-2y=-3
---------------
2y =22
y = 22/2 = 11
Then, y = 11.
To find x, we can substitute<em> y</em> in either equation [1] or [2].
Let us use [1]
5x+4y=25
5x+4(11)=25
5x+44=25
5x=25-44
5x=-19
x = -19/5
Then, the values for x and y of the equations is y = 11, and x = -19/5.