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2 years ago

X+8=21 I need helpppp

Mathematics

2 answers:

Mrac [35]2 years ago

8 0

You add 13 and 8 it gets 21 so for X its 13

oksano4ka [1.4K]2 years ago

3 0

X = 13.

Because you want x by itself, to need to remove the +8. So, you must do the opposite to BOTH sides. The opposite of +8 is -8, and 21-8=13. Therefore, x=13.

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What is the answer to 2x+4y=16:4y=12

allsm [11]

Answer:

Here,

$2x + 4y = 16....eqn \: i \\ 4y = 12....eqn \: ii$

substituting the value of 4y in eqn i fron eqn ii

so eqn i becomes

$2x + 12 = 16 \\ 2x = 4 \\ x = 2$

$y = 12 \div 4 = 3$

Thus,

$x = 2 \: and \: y = 3$

...hope this helps:)

8 0

1 year ago

Choose the best option.

Setler [38]

Answer:

Point

Explanation:

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5 0

2 years ago

Solve each equation and leave the answer in terms of “i”

almond37 [142]

17)
x² + 8 = -8
x² = -8 - 8
x² = 16
x = ±√-16
x = ±√16i
x = <span>±4i
</span>
18)
x² + 5 = -3
x² = -3 - 5
x² = -8
x = ±√-8
x = ±√8i
x = ±2√2i

19)
x² + 3 = 0
x² = -3
x = ±√-3
x = <span>±</span>√3i

hope this helps, God bless!

3 0

2 years ago

Please help me with this question.

Rufina [12.5K]

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m∠AOC = 3m∠AOB

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3 0

2 years ago

12−(−2) over a line 12−6÷2

joja [24]

Given 12−(−2) over a line 12−6÷2

We can use PEMDAS rule and solve the expression in the order as given below:-

1. Parentheses

2. Exponents

3. Multiplication

4. Division

5. Addition

6. Subtraction

Now solving for given expression:-

$\frac{12-(-2)}{12-(\frac{6}{2})}\\\\=\frac{12+2}{12-3}\\\\=\frac{14}{9}$

So final answer is 14/9 i.e. 14 over 9.

7 0

2 years ago