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mash [69]
4 years ago
15

4. Explain and correct the error made by a student who simplified this expression.

Mathematics
1 answer:
Fiesta28 [93]4 years ago
3 0

Answer:

I notice that the first equation has a 7x, term and the second equation has a -7x term. These terms will cancel if we add the equations together—that is, we'll eliminate the the x terms:

Step-by-step explanation:

2y+7x= -5 + 5y-7x=12

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3 years ago
What is the length of side c
Nutka1998 [239]

c ≈ 16.7 ( to 1 dec. place ) → d

since triangle ABC is right use the cosine ratio to find c

cos33° = \frac{adjacent}{hypotenuse} = \frac{14}{c}

multiply both sides by c

c × cos33° = 14 ( divide both sides by cos33° )

x = \frac{14}{cos33} ≈ 16.7 ( to 1 dec. place )


7 0
4 years ago
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ruslelena [56]

Answer:

a

Step-by-step explanation:

the answer is a because thats the answer.

4 0
3 years ago
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Part C
BabaBlast [244]

Answer:

The expression from part B is = (1 • 2) • (106 • 10-8).

Multiply the first factors.

1 • 2 = 2

Multiply the powers of 10 using this property of exponents: anam = an + m.

106 • 10-8 = 106 + (-8) = 10-2

The expression is 2 × 10-2.

Step-by-step explanation:

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7 0
2 years ago
What number must you add to complete the square?<br> x2 + 6x = 15
slega [8]

Answer: 9

Step-by-step explanation:

x2+6x+(3)2=15+(3)2

x2+6x+9=24

(x+3)2=24

x=±2√6−3

x=±2√6−3 is final answer

5 0
4 years ago
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