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3 years ago

What is the sum of the expression ? (9 c − 8 d ) + ( 2 c − 6 ) + ( − d + 3 )

Mathematics

2 answers:

Dmitrij [34]3 years ago

4 0

Answer:

12c - 9d + 3

Step-by-step explanation:

(9 c − 8 d ) + ( 2 c − 6 ) + ( − d + 3 )

Combine like terms ( the d's with the d's, the c's with the c's and the numbers without the variables with the number w.out the variables)

9c - 8d + 3c - 6 - d + 3

12c - 9d + 3

That is at it's simplest form

Hope this helped!

have a supercalifragilisticexpialdocious day!

Wewaii [24]3 years ago

3 0

The answer is:
5 ( 6 r - 1 ) 6

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A line with a slope of 10 passes through the points (7,4) and (6,p). What is the value of p? p=

kifflom [539]

Answer:

p = -6

Step-by-step explanation:

10 = (p - 4)

6 - 7

-10 = p - 4

p = -6

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3 years ago

N/15=21/35 Solve for the missing value in the proportion.

Serhud [2]

Answer:

n=9

Step-by-step explanation:

21/35 has a gcf of 7. so reduce to 3/5

move 3/5 to the left side to get

n/15=-3/5=0

solve as a linear equation.

n/15=-3/5=0 is equivalent to .67*n-0.6=0

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4 0

3 years ago

Lucas is making accessories for the soccer team. He uses 883.68 inches of fabric on headbands for 46 players and 2 coaches. He a

zimovet [89]

The total fabric used for headband and wristband of a player was: 27.84 inches

Step-by-step explanation:

The question will be solved step by step.

So,

Total ribbon used for headbands = 883.68 inches

Total number of people for whom headbands were made = 46 players + 2 coaches = 48 inches

so the headband for one person will use fabric: $\frac{883.68}{48}\\= 18.41\ inches$

Then

Total fabric used for wristbands = 433.78 inches

Total players = 46

$Fabri\ for\ one\ player's\ wristband = \frac{433.78}{46}\\=9.43\ inches$

Total fabric for one player = 18.41 + 9.43 = 27.84 inches

Hence,

The total fabric used for headband and wristband of a player was: 27.84 inches

Keywords: Fractions, decimals

Learn more about fractions at:

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6 0

3 years ago

Yuto and Lian are at train stations 1,880 kilometers apart. Yuto boards a train heading east at an average speed of 220

Doss [256]

Answer:

1,000 km

Step-by-step explanation:

Assume that when two train pass each other, Lian has traveled x (km)

=> The time Lian has traveled when two trains pass each other is:

Time = Distance/ Rate = x/ 250 (hour)

As Lian and Yuto travelled from the two opposite train stations and the train stations are 1,880 km apart

=> When two train pass each other, Yuto has traveled 1,880 - x (km)

=> The time Yuto has traveled when two trains pass each other is:

Time = Distance/ Rate = (1,880 - x)/220 (hour)

As Lian and Yuto board at the same time, so that when two trains pass each other, the time both of them have traveled is equal

=> x/ 250 = (1,880 - x)/220

=> 220x = 250 x (1,880 -x)

=> 220x = 470,000 - 250x

=> 470x = 470,000

=> x = 1,000

So that, when two train pass each other, Lian has traveled x = 1,000 km

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