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kirza4 [7]
3 years ago
11

5a + 7b - 4 ( 3a + 6) = help pls

Mathematics
1 answer:
Helga [31]3 years ago
7 0

Answer:

-7a+7b-24

Step-by-step explanation:

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- Let y represent the width of a rectangle and let x represent the rectangle's lengu.
valentina_108 [34]

Answer:

Length: 21 cm and Width:  6cm

Step-by-step explanation:

Let y be the width and x length of the rectangle. We know:

x = 4y -3 -------- eq. 1

54 = 2x + 2y    (Perimeter of the rectangle) ------- eq.  2

Substitute equation 1 in equation 2:

54 = 2(4y-3) + 2y\\54 = 8y - 6 + 2y\\54 + 6 = 8y + 2y\\60 = 10 y\\\\\frac{60}{10}= y\\y = 6

Using the value of y, we find x.

x = 4y - 3\\x = 4(6) -3\\x= 24 - 3\\x = 21

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4 years ago
Lightning strikes Earth 1000 times in 10 seconds. How many seconds does it take for lightning to strike 7250 times? It takes sec
borishaifa [10]

Answer:

1000 / 10 = 100 strikes per second. Now, multiply by 12 to find the number of strikes that occurred. 100 * 12 = 1200 strikes in 12 seconds. Part B: Divide the number of seconds to the number of lightning strikes to find the average rate. 10 / 1000 = 0.1 seconds per strike. Now, multiply by 7250 to find the number of seconds that passed.

Step-by-step explanation:

8 0
3 years ago
The rectangle below has an area of x^2-15x+56x
vova2212 [387]
Report this clown who put the first answer he’s trying to get your ip
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2 years ago
They're the same because...?
emmasim [6.3K]

Answer:

thay still give you the same answer

Step-by-step explanation:

2x3x4=24

while bxh

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6 0
3 years ago
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Please help me with question 9 please
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Answer:

22(12) - 18

Step-by-step explanation:

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4 years ago
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