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Andrews [41]
3 years ago
11

Evaluate the expression for x = –3.

Mathematics
1 answer:
almond37 [142]3 years ago
5 0
To answer this question you must first plug in the given value for x into your given expression.
Your given x value is a -3.
When plugged in, this leaves you with:
-3^2 + 4(-3) + 3

Next, follow PEMDAS (parenthesis, exponents, multiplication, division, addition, subtraction) to begin to simply your expression.
Start by multiplying the parenthesis, this leaves you with:
-3^2 - 12 + 3

After that, simplify your exponents by squaring the -3. You do this by multiplying it by itself.
This leaves you with:
9 - 12 + 3 (the 9 is positive because the two negative multiplied together cancelled to make a positive)

Finally, simplify across with addition and subtraction to get your final answer.
This results in:
0

So, when x = -3 in this expression, the answer is 0.

I hope this helps! :)
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Which expression could help you find the distance between (10, 4) and (–6, 4)?
jok3333 [9.3K]

Answer:

Step-by-step explanation:

the  expression could help you find the distance between A(x; y) and B(x',y')is:

AB = √((x-x')²+(y-y')²)

in this exercise  :  x = 10

                             x' = - 6

                              y =4

                             y' = 4

cotninue ..................................

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4 years ago
X°and x+2 are complementary angles then find the angles<br>​
Elanso [62]

Answer:

44° and 46°

Step-by-step explanation:

Complementary angles sum to 90° , thus

x + x + 2 = 90

2x + 2 = 90 ( subtract 2 from both sides )

2x = 88 ( divide both sides by 2 )

x = 44

Thus the 2 angles are 44° and 44 + 2 = 46°

4 0
4 years ago
Plz help me i need it
zavuch27 [327]

Answer:   \bold{b)\quad y=\dfrac{log_4-9}{2}}

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

Inverse is when you swap the x's and y's and solve for y.

y=4^{2x+9}\\\\\text{Swap the x's and y's:}\\x=4^{2y+9}\\\\\text{Apply }log_4\text{ to both sides:}\\log_4x=log_44^{2y+9}\\\\log_44\text{ cancels out:}\\log_4x=2y+9\\\\\text{Subtract 9 from both sides:}\\log_4x-9=2y\\\\\text{Divide both sides by 2:}\\\dfrac{log_4x-9}{2}=y

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4 years ago
Solve for x and y x+y=15 x+2y=23
BigorU [14]

Answer:

x=7, y= 8

Step-by-step explanation:

x+y=15

x+2y=23

Subtract the first equation from the second equation to eliminate x

x+2y=23

-x-y=-15

--------------------

  y = 8

Now we can find x

x+y = 15

x+8 = 15

Subtract 8 from each side

x+8-8=15-8

x = 7

5 0
3 years ago
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