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masha68 [24]
4 years ago
5

If the width of a rectangle is represented by 3x-5 and the length is represented by 4x-4, which expression represents the area o

f the rectangle?
Mathematics
2 answers:
ankoles [38]4 years ago
8 0

Answer:

7x-9

Step-by-step explanation:

ignore this it is wrong my bad

adding like terms

3x+4x=7x

-5+-4=-9

7x-9

kondor19780726 [428]4 years ago
7 0

Answer:

A = 12x^2 - 32x + 20

Step-by-step explanation:

The area of a rectangle of length L and width W is A = L*W.

Here the area is A = (3x - 5)(4x - 4) = 12x^2 -12x - 20x + 20, or

A = 12x^2 - 32x + 20.

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7. Jason wants to walk the shortest distance to get from the parking lot to the beach
Assoli18 [71]
There are 3 right triangles.
                         Long leg          short leg           hypotenuse
Large                  ?                          ?                       32+18 = 50 m
Medium            32 m                     x                          ?
Small                   x                         18 m                    ?

Similar triangles: small & medium

short leg / long leg
x/32 = 18/x
x*x = 18 * 32
x² = 576
√x² = √576
x = 24

                       Long leg          short leg           hypotenuse
Large                  ? → 40 m          ?                       32+18 = 50 m
Medium            32 m                     24 m                 ? → 40 m
Small                24 m                     18 m                  ? → 30 m

solve hypotenuse of medium and small using Pythagorean theorem.

32² + 24² = c²
1024 + 576 = c²
1600 = c²
√1600 = √c²
40 = c

24² + 18² = c²
576 + 324 = c²
900 = c²
√900 = √c²
30 = c

Solve for the long leg of the large right triangle using ratio and proportion
medium and large: long leg / hypotenuse

32/40 = x/50
32*50 = 40 * x
1600 = 40x
1600/40 = x
40 = x
<span>
</span><span>A. How far is the spot on the beach from the parking lot? 24 meters

B. How far will he have to walk from the parking lot to get to the refreshment stand? 40 meters
</span>
7 0
3 years ago
Express the polynomial 7x + 3x + 5 in standard form
frosja888 [35]

<u><em>The equation is already in the standard form. </em></u>

= 10 x + 5



3 0
3 years ago
Lori rented a car for one day. The daily rent day was $12. 50 plus 25 cents per mile. The total cost of her rental was $46. How
GalinKa [24]
The correct answer is 134
8 0
3 years ago
Solution q-2r=4<br> q+r=37
GenaCL600 [577]
Q-2r=4, therefore: q=4+2r.

Plug the value of q into q+r=37, so you get:

4+2r+r=37

3r=37-4=33

3r=33

Therefore: r=11.

q-2r=4, but r=11, so:

q-2(11)=4

q-22=4

Therefore q=26.

Check if the answer is correct using second equation:

q=4+2r=4+2(11)=4+22=26.

So: q=26 and r=11.


4 0
4 years ago
Read 2 more answers
The perimeter of a chalkboard is 14 feet. The board is 4 feet long. How tall is it?<br> feet
motikmotik

Answer:

3 feet

Step-by-step explanation:

P=2(a+b)

14=2(4+b)

14=8+2b

2b=6

b=3

7 0
3 years ago
Read 2 more answers
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