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ira [324]
2 years ago
9

Which is TRUE about ALL expressions?

Mathematics
1 answer:
Zanzabum2 years ago
8 0

Expressions do not have an equal sign (although they can have operators such as plus or minus).

2x+1 is an expression.

2x+1=1 is an equation since it has an equal sign.

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What are the solutions to the equation (x – 2)(x + 5) = 0?
nataly862011 [7]

A product of two (or more) factor can be zero if and only if at least one of the factors is zero.

In other words, you cannot multiply two non-zero real numbers, and have zero as a result.

So, if we want the product of these two factors to be zero, at least one of them has to be zero.

The first factor is zero if

x-2 = 0 \iff x=2

The second factor is zero if

x+5 = 0 \iff x=-5

4 0
3 years ago
Read 2 more answers
4 times a number increased by 7 . Explain your answer if you can
Romashka-Z-Leto [24]

Step-by-step explanation:

4 times = 4x increased by 7 = 4x+7

4x + 7

7 0
2 years ago
Find the length of the unknown side. Round your answer to the nearest tenth.
slamgirl [31]

Answer:

11.5

Step-by-step explanation

a^2+b^2=c^2

8(8)+(x)^2=196

64 + x^2=196

\sqrt{x^{2} }=\sqrt{132}

x=11.48

x=11.5 rounded

6 0
3 years ago
If x varies inversley as y and x=4 when y =8, find x when y=1
nikitadnepr [17]

Answer:

x = 32

Step-by-step explanation:

If x and y vary inversely, then xy = k where k is the constant of proportion

4(8) = 32 = k

Now, xy = 32

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4 0
3 years ago
Can someone tell me how to write a linear equation from a graph?
kotykmax [81]

Answer:

y=mx+b

Step-by-step explanation:

4 0
2 years ago
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