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3 years ago

If a = 1 and b = -3, what is the value of a - 21 + 12 - bl? A. -2 B. 4. D. 6 E. 8

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

4 0

Answer:

A -2 i think so im sorry if it's wrong

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How to add subtract multiply and divide radical expressions

dem82 [27]

Heres some info i learend

s but its not complete maybe i guess

Terms. We combine em by adding. The numbers or subtracting the numbers that are multiplied times the radicals.

7 0

3 years ago

-4-8 and 3-(-1)<br> thats it

mr Goodwill [35]

Answer:

-4-8=-12. 3-(-1)=3

Together they equal -9

Step-by-step explanation:

You have to multiply by the - sign outside the parentheses and the first one just count backwards

8 0

3 years ago

Read 2 more answers

NEED HELP PLEASE IM BEGGING YOU !!!!

Viefleur [7K]

Answer:

I think that it is c or a

Step-by-step explanation:

i have no explanation i just think that it is c or a

3 0

3 years ago

3x to the power of 3 + 21x squared + 36x = 0 by factoring the quadratic equation.

Diano4ka-milaya [45]

Answer:

x = 0, -4 and -3.

Step-by-step explanation:

The given expression is "3x to the power of 3 + 21x squared + 36x = 0".

We can write this expression as follows :

$3x^3+21x^2+36x=0$

Taking 3x common.

$3x(x^2+7x+12)=0\\\\3x=0\ \text{and}\ (x^2+7x+12)=0$

x = 3

$x^2+7x+12=0\\\\x^2+3x+4x+12=0\\\\x(x+3)+4(x+3)=0\\\\(x+4)(x+3)=0\\\\x=-4,-3$

Hence, the solution of the given quadratic equation are x = 0, -4 and -3.

5 0

3 years ago

What is the solution to the linear equation?<br><br> 4b + 6 = 2 – b + 4

Reil [10]

Answer:

$\large\boxed{b=0}$

Step-by-step explanation:

$4b+6=2-b+4\qquad\text{combine like terms}\\\\4b+6=(2+4)-b\qquad\text{add}\ b\ \text{to both sides}\\\\5b+6=6\qquad\text{subtract 6 from both sides}\\\\5b=0\qquad\text{divide both sides by 5}\\\\b=0$

8 0

3 years ago

Read 2 more answers