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dedylja [7]
3 years ago
9

Simplify (2d+3) + (3d-12)

Mathematics
2 answers:
8_murik_8 [283]3 years ago
3 0

Answer:

5d-9

Step-by-step explanation:

add the two sides together. the parentheses don't do anything to the equation really

xz_007 [3.2K]3 years ago
3 0

Step-by-step explanation:

2d+3d+3-12

5d-9

d=9/5

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An airplane flies 3800 km in 4 hours 45 minutes. What is its average speed in kilometers per hour?
8_murik_8 [283]

Average speed = (distance covered in some time)  /  (time to cover the distance)

4 hours 45 minutes = 4-3/4 hours = 4.75 hours

Average speed  =  (3,800 km) / (4.75 hours)  =  800 km/hr
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The number has 2 digits - let's call them x and y. The positive difference between the two combinations (lowest-highest and highest-lowest) is always equal to the positive difference of x and y, multiplied by 9.

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Set up a proportion and solve each problem. Round each answer to the nearest tenths. 5) What is 35% of 74? 6) 78 is what percent
prisoha [69]

Answer:

5)  35 / 100 = X / 74      X = 2590 / 100 = 25.9

or .35 * 74 = 25.9

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8 0
2 years ago
Pleaseeeeee solveee 25 points pleaze help geometry
tatiyna

Answer:

(-3/2, 6)

Step-by-step explanation:

(-3,8) (6,-4)

As we move along the line segment with endpoints (-3,8) and (6,-4) from  (-3,8) to (6,-4) x increases by 9 units (from -3 to 6) and y decreases by -12 units (from 8 to -4).

for ratio of 1:5

Since 1+5=6, the point we are looking for is 1/6 of the way from (-3,8) to (6,-4).  

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= (-3/2, 6)

for map reference see the image below

8 0
3 years ago
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