There are 49 vehicles in the parking lot. The ratio
of cars to trucks is 3:4.
How many trucks are in
the lot?

There are 28 trucks in the parking lot

Step-by-step explanation:

First, to find the unit rate we need to do 49/7 which = 7. So, now we know that the unit rate is 7. You have to multiply 7 x 4 to get the answer 28.

Hope this helps!

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

maya’s expression will generate the wrong sum because she violated the commutative property.

step-by-step explanation: