Answer:
0.4
Step-by-step explanation:
so, Katherine can do 0.1 of the job per hour. (if she needs 10 hours for the job, each hour she can do the whole divided by the time, so 1/10, which is 0.1)
if in two hours she and Marina can be done, then Marina will do 1(the whole job)-2/10 (twice as much as she can do in an hour)=0.8 of the job. So if Marina does 0.8 of the job in two hours, each hour she will do half of it: 0.4 - and this is the correct answer
Answer:
a,b=4,-2
Step-by-step explanation:
Subtract:
a-a+4b-10b=-4-(-16)
-6b=-4+16
-6b=12
b=-2.
Plug in:
a+4(-2)=-4
a-8=-4
a=4.
Hope this helps plz hit the crown :D
Answer:
The answer is 128
Step-by-step explanation:
2³ × 2⁴ = 2⁷ ( when it comes to multiple with the same base, the power must add together)
= 128
(Correct me if i am wrong)
Answer:
450 feet at ground level
Step-by-step explanation:
The width of the bridge at ground level will be where the function intercepts the x-axis also known as the roots or zeros of the function. They are found using the zero product property to set each factor equal to 0.
This means (x-225) = 0 and (x + 225) = 0. So x = -225, 225.
This means the width is the absolute value of |-225| + 225 since distance cannot be negative. This makes it 450 feet.
A to goes to iv; B goes to ii; C goes to i; D goes to iii
