All categories

3 years ago

X^2- 11 = 70 I need help on how to solve this

2 answers:

6 0

Answer: Add 11 to the other side of the equation, giving you 81. Then, since x is square you are going to need to square root both sides ( $\sqrt{x}$ this symbol). When you do that, you should get what x is! Let me know if you still need help!

iren2701 [21]3 years ago

4 0

<h3>Answer:</h3>

±9

<h3>Step-by-step explanation:</h3>

<u>We are given the equation:</u>

x² - 11 = 70

<u>Solving for x:</u>

x² - 11 = 70

x² = 81 [adding 11 on both sides]

x = ±√81 [taking the square root of both sides]

x = ±9

You might be interested in

A bag contains 10 marbles: 2 are green, 3 are red, and 5 are blue. Boris chooses a marble at random, and without putting it back

Anni [7]

Answer: 47/90

Step-by-step explanation:

3/10+2/9=47/90 somehow ig

5 0

2 years ago

Please help me need to revise for a testtt!!!!

LUCKY_DIMON [66]

Remember you can add like terms exg, 3y+4y=7y 3y^2+4y^2=7y^2, but cannot add 3y^2 and 4y, or 3 and 4y so

3a+2w-5a-9w
group like trems
3a-5a+2w-9w
subtract
-2a-7w

3y^2+2w^2-y^2-w^2
group like terms (think of w^2 and y^2 as 1w^2 and 1y^2)
3y^2-y^2+2w^2-w^2
subtract
2y^2+w^2

2x+2x=4x

3 0

3 years ago

Read 2 more answers

Gareth 30 students in a class and the ratio of boys to girls in the class is 2:3 calculate the number of goals

pishuonlain [190]

Answer:

<em>There are 12 boys and 18 girls</em>

Step-by-step explanation:

<u>Equations</u>

There are 30 students in a class. Let's call:

x = number of boys

Since the sum of boys and girls is 30:

30 - x = number of girls

The ratio of boys to girls is 2:3, thus:

$\displaystyle \frac{x}{30-x}=\frac{2}{3}$

Crossing denominators:

3x = 2(30 - x)

Operating the parentheses:

3x = 60 - 2x

Adding 2x:

5x = 60

Dividing by 5:

x = 60/5 = 12

x = 12

There are 12 boys and 30-12=18 girls

8 0

3 years ago

Example: Find the circumference of the circle with a radius of 5 inches. Solution: Step 1: Write down the formula: IC = 2tr Step

GREYUIT [131]

Answer:

1. The circumference of any circle equals two times its radius multiplied by pi (π, approximately 3.14). We can also say it equals pi times its diameter.

Thank you

7 0

3 years ago

The expression \dfrac12bh

mariarad [96]

Answer:

2 one.

Step-by-step explanation:

3 0

3 years ago