2y is in the first equation so if you change 0.5x+y=17 to y=17-0.5x and then double it to 2y=34-x, you can substitute and find x. And then you can find out y.
How to find x:
0.5x+y=17
y=17-0.5x
2y=34-x
3x-2y=8
3x-34-x=8
<u>x=21</u>
How to find y (with previous info.)
x=21
3x-2y=8
3*21-2y=8
63-8=2y
55=2y
<u>27.5=y</u>
Answer:
a = -15
Step-by-step explanation:
multiply both sides by 3, then you get a = -15
Answer:
47°
Step-by-step explanation:
If angles are complementary, that means those angles are added up to 90°.
Therefore,
43 + x = 90
<em>Take 43 to the right side to make x as the subject.</em>
x = 90 - 43
x = 47°
Answer:
Step-by-step explanation:
<u>Scale factor</u>
<u>Size of each garden bed on the drawing</u>
<u>Actual size</u>
- 8cm = 4*2 cm ⇔ 4 ft
- 16 cm = 8*2m ⇔ 8 ft
<u>Area of one garden bed</u>
