Going south means you're going in the negative direction along the y axis
Going 4 yards south would be represented as -4 on the y axis number line (this is the vertical number line)
change the mixed numbers to improper fractions and multiply the numerators / denominators
10 
= 
× = = 1110 
20x - 30y = -50 ⇒ 20x - 30y = -50
x + 2y = -1 ⇒ <u>20x + 40y = -20</u>
<u>-70y</u> = <u>-30</u>
-70 -70
y = ³/₇
20x - 30(³/₇) = -50
20x - 12⁶/₇ = -50
<u> + 12⁶/₇ + 12⁶/₇
</u> <u>20x</u> = <u>47¹/₇
</u> 20<u /> 20<u>
</u> x = 2⁷/₂₀
(x, y) = (2⁷/₂₀, ³/₇)
Answer:
B. 80 km/h
Step-by-step explanation:
The graph is linear and goes through the origin, so distance is proportional to time, and the constant of proportionality is speed. The desired answer can be read from the point on the graph at time = 1 hour: 80 km.
Julian's speed is 80 kilometers per hour.
Answer:
2h-3a
Step-by-step explanation:
First Find f(a+h)
f(a+h) =-a-h
Then find f(a)
f(a) =2a-3h
Then f(a+h) - f(a)= - a-h-(2a-3h)=2h-3a
