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3 years ago

What is the value of xin the diagram? A. 9 B. 8 C. 7 D. 6

Mathematics

1 answer:

RoseWind [281]3 years ago

7 0

Answer:

Step-by-step explanation:

The ratio of the similar triangles is

14 49

---- = ------

2 x

Using cross products

14x = 2*49

14x = 98

Divide by 14

14x/14 = 98/7

x =7

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Anettt [7]

Answer:

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Step-by-step explanation:

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3 years ago

Factor x3 – 7x2 – 5x + 35 by grouping. What is the resulting expression?

Afina-wow [57]

Answer:

3rd option

Step-by-step explanation:

Given

x³ - 7x² - 5x + 35 ( factor the first/second and third/fourt terms )

= x² (x - 7) - 5(x - 7) ← factor out (x - 7) from each term

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5 0

2 years ago

Simplify the difference. (–7x – 5x^4 + 5) – (–7x^4 – 5 – 9x)

sineoko [7]

Answer: $2x^4+2x+10$

Step-by-step explanation:

You need to remember the mulplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-$

Knowing this, you can distributive the negative sign. Then you get:

$(-7x- 5x^4 + 5) - (-7x^4 - 5 - 9x)=-7x- 5x^4 + 5 +7x^4 + 5 + 9x$

Now you need to add the like terms. Then:

$=2x+2x^4+10$

Finally, you can order the polynomial obtained in descending order. Therefore, the answer is:

$=2x^4+2x+10$

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2 years ago