#5. $5.50 + 0.89r would be less than 26.00.
#19. 10x + 4 = 30 would be correct.
#20. would be C.
Hope this helps.
Are you supposed to multiply these? If so your answer would be (5x*x^2) + (5x*-x) + (5x*-7). This comes out to 5x^3 - 5x^2 - 35x. Hope this helps!
Answer:
boxes 1, 3, and 4
Step-by-step explanation:
First of all, recall that 1.5m is the same as 150cm.
Now, we simply build a proportion where we consider 48 to be 100, and wonder what 150 will be:
Solving for x, we have
Which actually makes sense, because we're stating that 1.5m is about 300% of 48cm, which means three times as much. Which is true, because three times 48cm means 144cm, which is about 1.5m
Variable
variables are any letters you use, such as in 3x, x is your variable. It holds an unknown value