3 years ago

Which of the following polynomials contains like terms?

Mathematics

2 answers:

zhuklara [117]3 years ago

3 0

Answer:

The last one.

ANEK [815]3 years ago

3 0

-x7+x7+x5-4 is your answer

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Solve 5x + 14 = k for x

densk [106]

Answer:

$x = \frac{k - 14}{5} \\$

Step-by-step explanation:

$5x + 14 = k \\ 5x = k - 14 \\ x = \frac{k - 14}{5} \\$

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3 years ago

What number must be added to the expression below to complete the<br> square?<br> x² - 18x

kiruha [24]

Answer:

$\boxed {\boxed {\sf 81}}$

Step-by-step explanation:

The standard form of a quadratic is:

$ax^2+bx+c$

To complete the square, the a (leading coefficient) must be 1 and there can only be terms with variables on one side.

The expression given:

$x^2-18x$

follows these rules. Next, we divide the b (linear coefficient) by 2, then square it. Basically:

$(\frac{b}{2})^2$

The b in the expression is -18.

$(\frac{-18}{2})^2$

$(-9)^2= -9*-9= 81$

This is the number that is added.

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3 years ago

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3 years ago

The length of a rectangle is 5 cm more than the width perimeter is 38 cm find the length

ludmilkaskok [199]

Answer:

Width=x

Length =x+5

Perimeter =38

2(x+x+5)=38

=>4x+10=38

=>x=28/4

Step-by-step explanation:

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3 years ago

A store is having a sale where winter clothes are 60% of the original price. a sweater is on sale fo $30. what is the original p

Andreyy89

The original price would be $50

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3 years ago