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zalisa [80]
Answer:
#6 is D
#7 is A
Step-by-step explanation:
#6
-1/3(6x+15)-3
Distribute the -1/3
-1/3 times 6x is -2x
-1/3 times 15 is -5
-2x-5-3
-2x=8
#7
-12z-5z=85
COmbine like terms
-17z=85
Divide both sides by -17
z=-5
What problems will two decimal places have in the product? Select all that apply.
A 7.5 × 10
B 6.3 × 3
C 3.2 × 4.7
D 5 × 0.85
E 5.47 × 100
You simply try put the whole example in an equation form.
vc= velocity of car
vp= velocity of the plane
know it is given that the time of both travels is the same, and using the famous velocity time equation you can say,
t=(distance by the car/vc)=(distance by the plane/vp)
so
(150/vc)=(600/vp)
Now, given that vp=150+vc
We have;
(150/vc)=(600/150+vc)
multiply and you get an equality of
150(150+vc)=600vc
150^2+150vc=600vc
make all vc at one side, you have;
150^2=600vc-150vc
then; vc=150^2/450=50
and use the vp=150+vc equation again and you get,
vc=200mph.
Hope this helps.
Answer:
W=1/z(A-9z)
Step-by-step explanation:
Use the distributive property to remove the bracket.
A=Wz+9z
Subtract 9z on both the sides.
A-9z=Wz
Divide by z on both the sides.
W=1/z(A-9z)