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Pepsi [2]
3 years ago
9

Help Please!!!!! Evaluate the expression when n = 4 2n-7

Mathematics
2 answers:
Montano1993 [528]3 years ago
7 0
2•4= 8 8-7= 1
The answer is 1
crimeas [40]3 years ago
6 0

Answer:

the answer is 1.

Step-by-step explanation:

4 is equal to n so it would look like 24-7 but you have to multiply 2 and 4 which is 8. Then, you do 8-7 which is 1. hope this helped.

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Solve |x+2|=10<br> Please help
Anvisha [2.4K]

x = 8, --- 12

I hope this helped :))))))))))))))))))

7 0
3 years ago
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Find the simple interest for $2,800 at 4% for 4 yrs
SVEN [57.7K]
It would be 2800*0.04*4. Your final answer will be $448
6 0
3 years ago
Will give brainliest to correct answer.
kirill [66]
It's going to be kind of crazy, but you need to use Pythagorean's Theorem for this.  That will look like this: (2 \sqrt{x} +1)^2=( \sqrt{x} +1)^2+(2 \sqrt{x} )^2.  FOIL out the left side to get 4x+4 \sqrt{x} +1.  FOIL out the first of the 2 expressions on the right to get x+2 \sqrt{x} +1,  and the second of the 2 to get 4x.  Our equation now looks like this:  4x+4 \sqrt{x} +1=x+2 \sqrt{x} +1+4x.  Combine like terms to get an equation that still has square roots in it that we have to deal with:  4x-x-4x=-2 \sqrt{x}  and x=2 \sqrt{x}.  We will square both sides to get rid of the square root sign.  x^{2} =2x.  This is a polynomial now that can be factored to solve for x.  Bring the 2x over by subtraction and set the polynomial equal to 0.  x^{2} -2x=0.  Factor out an x, leaving us with  x(x-2)=0.  That means that x = 0 or x - 2 = 0 and x = 2.  Of course if we are solving for the length of a side we know it can't have a side length of 0, so it must have a side length that is a multiple of 2.  x = 2
3 0
3 years ago
Read 2 more answers
Which of the following is the solution set of x² + 8x + 12 = 0?
raketka [301]

Answer:

\fbox{\begin{minipage}{9em}x = -2 and x = -6\end{minipage}}

Step-by-step explanation:

Given:

x^{2} + 8x + 12 = 0

Solve for:

x

Solution:

Step 1: Select the formula to solve for x

There are some ways to solve quadratic equations.

One of the simple way (if possible) is performing the factorization.

Another way is using the quadratic formula.

Here, we are going to use factorization.

Step 2: Perform factorization

      x^{2} + 8x + 12 = 0

<=>x^{2}  +  2x + 6x  + 12 = 0

<=>(x^{2} + 2x) + (6x + 12) = 0

<=>x(x + 2) + 6(x + 2) = 0

<=>(x + 2)(x + 6) = 0

<=> x = -2 or x = -6

Hope this helps!

:)

4 0
3 years ago
The sum of this 4 digit even number's thousands and ones digit is 10
Vladimir [108]
Even
means ends with 0,2,4,6,8

adds to 10
the last number cannot be 0 because the first cannot be add to 10

it can be
8xx2
6xx4
4xx6
8xx2

where x is any whole number you want
4 0
3 years ago
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