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3 years ago

Which number is prime? A. 21 B. 23 C. 25 D. 27

Mathematics

2 answers:

Novay_Z [31]3 years ago

6 0

Answer:

Step-by-step explanation:

IceJOKER [234]3 years ago

5 0

B. 23

Hope this helps!!!!!!

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Aisha estimates the product of 12 and 2.4 by rounding 2.4 to the nearest whole.

Tanya [424]

Answer:

Step-by-step explanation:

12*2=2

2.4 rounds down

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2 years ago

What is the value of X?

IRISSAK [1]

X=12
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10x-20+6x+8=180º

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3 years ago

Find the mean of the boys

gladu [14]

Answer:

14 is the mean of boys

Step-by-step explanation:

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2 years ago

Graham is graphing the inequality x greater-than 4. He draws a number line and shades over the numbers that are greater than 4.

schepotkina [342]

Answer:

Draw an open circle at 4

Step-by-step explanation:

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2 years ago

What is x2 – 6 = 16x + 30 rewritten in standard form, then factored?

AlexFokin [52]

Answer:

The standard form of quadratic equation is $x^2-16x-36=0$

The factored form of $x^2-16x-36=0$ is $(x+2)(x-18)=0$

Step-by-step explanation:

Given equation $x^2-6=16x+30$

We have to write in standard form and then factorize the given equation.

The standard form for a general quadratic equation is given as $ax^2+bx+c=0$

Consider $x^2-6=16x+30$

Taking all terms to left side, we have,

$x^2-6-16x-30=0$

Adding like terms, we have,

$x^2-16x-36=0$

Now we will factorize it.

We will solve the quadratic equation $x^2-16x-36=0$ using middle term splitting method,

-16x can be written as -18x+2x

$x^2-16x-36=0$ becomes

$\Rightarrow x^2-18x+2x-36=0$

Taking x common from first two terms and 2 common from last two terms we have,

$\Rightarrow x(x-18)+2(x-18)=0$

$\Rightarrow (x+2)(x-18)=0$

Thus, the factored form of $x^2-16x-36=0$ is $(x+2)(x-18)=0$

4 0

2 years ago

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