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Leviafan [203]
3 years ago
11

Which is the first incorrect step in the solution shown above ?

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
8 0

Answer:

Step 2

Step-by-step explanation:

2x was moved to 3x just to add.

It was supposed to be 3x - 2x = x

Sedaia [141]3 years ago
3 0

Answer:

Step 2 is incorrect

Step-by-step explanation:

Step 2 is incorrect

step 1: 3x + 15 = 2x + 35

step 2: subtract 2x from both sides

           3x + 15 - 2x = 2x + 35 - 2x

          x + 15 = 35

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Paul has 7 piles of sports cards. There are3 basketball. football. and4 baseball cards in each pile. How many total sports cards
aalyn [17]
Paul has 70 Total sport cards.

3 (Baseball) + 3 (Football) + 4 (Baseball) = 10 (Total cards per pile) × 7 (Total Piles) = 70 (Total Cards

3+3+4=10×7=70

(All shown work is this ^)

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8 0
3 years ago
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nexus9112 [7]

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3.25

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8 0
3 years ago
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A dinner plate has a circumference of 106.76 cm. What is the area of the dinner plate? Use = 3.14.
Sphinxa [80]
C=2pr,  r=c/(2p)

a=pr^2, using r found above we get:

a=p(c^2/(4p^2))

a=(c^2)/(4p), since c=106.76 and we approximate pi as 3.14

a=(106.76^2)/(4*3.14)

a=11612.2176/12.56 cm^2

a≈924.54 cm^2  (to nearest one-hundredth of a square cm)
3 0
2 years ago
An airplane is ascending at a constant rate of 15 feet per second what is the change in altitude during 10 minutes of flight
fenix001 [56]

Answer:

9000 ft

Step-by-step explanation:

Given: A airplane is ascending at a constant rate of 15 feet per second,

What we need to know: The change in altitude during 10 minutes of flight,

60 seconds = 1 minute

60 × 10

= 600 seconds

600 × 15

= 9000 ft

Therefore there was a 9000 ft change in altitude during the 10 minutes of the flight.

6 0
2 years ago
Suppose x=7 is a solution to the equation 4x-2(x+a)=8 how can you find the value of a that make the equation true
marta [7]

Answer:

a = 3

Step-by-step explanation:

Since x = 7 is a solution, substitute x = 7 into the equation and solve for a

4(7) - 2(7 + a) = 8 , that is

28 - 2(7 + a) = 8 ( subtract 28 from both sides )

- 2(7 + a) = - 20 ( divide both sides by - 2 )

7 + a = 10 ( subtract 7 from both sides )

a = 3

8 0
2 years ago
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