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3 years ago

(2x + 3)^2 , expand , if necessary combine like terms, please answer !!!!

Mathematics

2 answers:

butalik [34]3 years ago

5 0

Answer:

25x

Step-by-step explanation:

You would need to solve using PEMDAS or order of operations.

First, start with the parentheses.

2x + 3 = 5x.

Next, replace the equation we just did with the sum.

5x^2

Now, this symbol, ^, does not mean multiplying. You can, simply, think of it as multiplying, in this case, 5x by 5x. The answer would be 25x.

(sorry if im wrong)

allochka39001 [22]3 years ago

5 0

Answer:

4x^2+12x+9

Step-by-step explanation:

Notice that this expression has the following special form:

(a+b) (a+b) = (a+b)^2

(a+b)^2 = a^2 + 2ab +b^2

Use the following pattern we get:

(2x + 3) ^2

= (2x)^2 + 2(2x)(3) +3^2

=4x^2 + 12x + 9

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I’m confused on this one

Annette [7]

The answer is x=6 because 15x is equal to 90, so 90÷15=6

8 0

3 years ago

How do you solve: cos(x-π/3)=-1

gladu [14]

Answer:

x = $\frac{4\pi }{3}$

Step-by-step explanation:

given

cos(x - $\frac{\pi }{3}$ ) = - 1, then

x - $\frac{\pi }{3}$ = $cos^{-1}$ (- 1) = π

Add $\frac{\pi }{3}$ to both sides, hence

x = π + $\frac{\pi }{3}$ = $\frac{4\pi }{3}$

3 0

3 years ago

-16+5n=-7(-6+8n)+3<br><br> what is the work for this ?? this is the like only one i cant get

uranmaximum [27]

-16 + 5n = -7(-6 + 8n) + 3 Given
-16 + 5n = 42 - 56n + 3 Distribute
-16 + 5n = 45 - 56n Collect like terms
61n = 61 Add 56n to the left side and add 16 to the right side
n = 1 Divide 61 from both sides

The answer is n = 1. Remember that when you have a number beside two or more numbers in parentheses, you have to distribute, or multiply the number outside the parentheses by each number inside the parentheses.

Hope this helps!

4 0

4 years ago

im, Paco, Maria, and Jenny are standing in line for lunch. Jenny is standing between Paco and Maria, and Paco’s position in line

Zanzabum

Answer:

The person standing at the fourth position is Maria.

Step-by-step explanation:

We are given that,

There are four students standing in line for lunch namely, Tim, Paco, Maria and Jenny.

Now, as Jenny is standing between Paco and Maria.

So, we have the possibility, P J M.

Also, as Paco is standing at an odd numbered position.

So, we have, either Paco stands at 1st or 3rd position.

Further, it is given that, Tim is not standing on either end of the line.

<em>So, we get, the possibilities,</em>

P J T M and M J P T.

But, in M J P T, T=Tim is standing at the end of the line, which is not possible.

So, the final positioning is given by, P J T M.

Hence, the person standing at the fourth position is Maria.

3 0

3 years ago

The formula can be used to find the velocity v in feet per second of an object that has fallen h feet. Find the velocity of an o

Otrada [13]

I assume you are looking for the formula, and the velocity.

The formula:
v1^2-v0^2=2aS

where
v0=initial velocity (0 if object falls from rest), ft/s
v1=velocity reached after falling a distance S, ft/s
S=distance from initial position, positive downwards (for falling objects), ft
a=acceleration due to gravity, 32.2 ft/s^2 in imperial units

So substituting numbers, assuming initial velocity is zero (from rest), then
S=25 ft
v1^2-0^2=2*32.2*25
v1^2=1610
v1=sqrt(1610)
=40.1 ft/s

3 0

4 years ago