Answer:
x = 8
y = 11
Step-by-step explanation:
Total small box weight = 50x [x being the number of small boxes]
Total large box weight = 80y [y being the number of large boxes]
Total boxes = x+y = 19
Total weight = 1280
<em>Determine x and y.</em>
<u>You know 2 equations. One for weight and another for number of boxes each.</u>
<u>Rewrite second equation:</u>
x+y=19
y=19-x
<u>You have to plug in one into another.</u>
1280 = 50x + 80(19-x)
<u>Solve for x</u>
1280 = 50x + 1520 - 80x
-240 = -30x
x = 8
<u>Solve for y by plugging in x into one of the equations:</u>
8+y = 19
y = 11
Answer:
Here, I <u>graphed</u> it for you!
Answer:
12.75w + 25 = 114.25
w = 7
Step-by-step explanation:
since sarah is receiving 12.75 each week for a number of weeks, w (we don't know its value yet) we know that first part of the equation: that 12.75 is the coefficient next to w. Then we have the extra 25, so we know that adding 12.75w and 25 would give us sarah's total amount, which is 114.25.
to find out what w represents, we have to solve for it. solving for w means isolating it on one side. so, what we can do first is subtract 25 from both sides. that would then make the equation:
12.75w = 89.25
now, we have only one step left to isolating w, and that's to get 12.75 on the other side somehow. since we're multiplying 12.75 with w, and we're applying additive inverse properties, meaning the opposite of what is happening to cancel it out on the side it's in, we would divide 12.75 on both sides. in the left, 12.75 would cancel out, and in the right, we would divide 89.25 by 12.75. the quotient is 7.
now there's nothing left to take out to isolate w, so we have:
w = 7
sarah saved up for 7 weeks.
This is about conversion of currencies.
<u><em>He spent £25 on the first day.</em></u>
- We are told he had spent £28 over 7 days.
Each day, he spends 50 pence more than the previous day. This means that;
1 pound = 100 pence
Thus, 50 pence = (50 × 1)/100 = £0.5
- If the money he spent on the first day is £x.
- On second day, he would have spent a total of; £(x + 0.5)
- On third day; x + 0.5 + 0.5= x + 1
- On fourth day; x + 1 + 0.5 = x + 1.5
- On fifth day; x + 1.5 + 0.5 = x + 2
- On sixth day; x + 2 + 0.5 = x + 2.5
- On seventh day; x + 2.5 + 0.5 = x + 3
x = 28 - 3
x = £25
Read more at; brainly.com/question/22398109
Answer:
A and D are the ones that are right
