Answer:
AB=7
Step-by-step explanation:
(x-2)+(-15+2x)=10
x-2-15+2x=10
3x-17=10
3x=10+17
3x=27
x=27/3
x=9
AB=x-2=9-2=7
Answer:
free points sorry
Step-by-step explanation:
Answer:
It's kind-of blurry, can you copy-paste the questions?
Step-by-step explanation:
You are going to build a new garage similar to the rectangular one you currently have. The current dimensions are 16 feet wide by 24 feet long. You need to stake and rope off where the concrete will be poured. If the new garage is going to have a width of 24 feet, how much rope are you going to need?
-60 feet
-120 feet
-112 feet
-56 feet
Remember that
If two figures are similar, then the ratio of its corresponding sides is proportional , and this ratio is called the scale factor
In this problem
the scale factor is
24/16=1.5
so
the length is equal to
25a. You are given a formula for height and told that the value of "r" in the formula is 19.6. You are asked to find the value of t such that h = 14.7. Substitute the given values and solve for t the way you solve any quadratic equation.
14.7 = 19.6t -4.9t²
4.9t² -19.6t +14.7 = 0 . . . . . put the equation in standard form
4.9(t² -4t +3) = 0 . . . . . . . . . factor out 4.9 to simplify the numbers
(t -1)(t -3) = 0 . . . . . . . . . . .. divide by 4.9 and factor
The solutions to this are ...
t = 1, t = 3
After
1 second, the ball will reach the height of 14.7 meters.
25b. This question asks you to find the value of t that make h = 0.
0 = 19.6t -4.9t² . . . . . . substitute the given numbers
0 = 4.9t(4 -t) . . . . . . . . factor
The solutions to this are ...
t = 0, t = 4
The ball will hit the ground after
4 seconds.
_____
As you can see from the graph below, a graphing calculator can be helpful for solving problems of this sort.