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3 years ago

Is 5 in the solution of x+3>8?

Mathematics

1 answer:

Ivan3 years ago

8 0

Answer: D) No; If x is 5, the expression on the left simplifies to 8, making the inequality false.

In other words, if x = 5, then x+3 becomes 5+3 which ultimately becomes 8, but this is not greater than 8 on the right side.

Your steps could look like this

x+3 > 8

5+3 > 8 ... replace x with 5

8 > 8 ... this is a false inequality

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A. 12 + 4x = 6x + 10 – 2x

GalinKa [24]

An equation has infinitely many solutions if it can be manipulated all the way to an identity (i.e. an equality where the right and left hand side are the same). We have:

A) $12+4x=6x+10-2x \iff 12+4x=10+4x \iff 12=10$

which is impossible

B) $5x+14-4x=23+x-9 \iff x+14 = x+14$

which is an equality

C) $x+9-0.8x=5.2x+17-8\iff 0.2x+9=5.2x+9 \iff 0.2x=5.2x\iff x=0$

which has a unique solution

D) $4x-2x=20 \iff 2x=20 \iff x=10$

which has a unique solution

3 0

3 years ago

What is the volume of this solid figure made with cubes?

Vadim26 [7]

Answer:

15 cubic units

Step-by-step explanation:

Use multiplication (V = l x w x h) to find the volume of a solid figure.

3*5=15

3 0

3 years ago

Help me pleaseee thankss

GuDViN [60]

A.) 2k-7
B.)7t+10 I’m not 100% sure but I suck at math and I have to answer questions so sorry if it’s wrong but good luck and try ur best <3

5 0

3 years ago

Leena consumes 400 calories at breakfast and 350 calories at lunch. She consumes of her daily calories at dinner. If x represent

nydimaria [60]

Answer:

759

Step-by-step explanation:

porque suamas y eso te da

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2 years ago

You will need 100 feet of fencing to put all the way around a rectangular garden. The length of the garden is 30 feet. What is t

gregori [183]

Answer:

20 feet

Step-by-step explanation:

100-(2*30)=40

40/2=20

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3 years ago