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Mathematics

1 answer:

Ray Of Light [21]4 years ago

5 0

72 cubic inches! :) You can just add the cubes, while most ask for height x length x width

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Help Plz

serg [7]

Hey!
Let p = cost of a pen
Let n = cost of a notebook 

The info in the question leads to two equations: 

1) 2p + 3n = 5.55 
2) p + 2n = 3.50 

Multiply equation 2) by 2 to get the new system of equations 

1a) 2p + 3n = 5.55 
2a) 2p + 4n = 7.00 

Subtract equation 1a) from equation 2a) to get 

n = 1.45 ...................... that's the cost of one notebook 

~~~~~~~~ 
To check, you could go on to figure out p, which turns out to be 0.60 . Put in those values of n and p into the original equations to verify.
Hope this helps! ~Nadia~

6 0

4 years ago

Read 2 more answers

Given y = 2x2 - 10x. Find all real values of x for which y = -3.

Stella [2.4K]

First, plug in -3 for the y value.
-3=2x²-10x
Then, add 3 to both sides.
0=2x²-10x+3
Use the quadratic equation to solve
(-b+-√b²-4ac)/2a
You get 4.68 or 0.32
You still have to check your answer to see if there is an excluded value.
Both values check.

6 0

4 years ago

Read 2 more answers

Describe the end behavior of the function f(x)=-2x^4- x^3 +3.

Hoochie [10]

Answer:

Step-by-step explanation:

For a polynomial , the behaviour as x gets large is determined by the term of greatest degree,

f(x) = - 2 $x^{4}$ - x³ + 3