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bixtya [17]
1 year ago
14

Simplify the following expression.

Mathematics
2 answers:
kobusy [5.1K]1 year ago
6 0

Step-by-step explanation:

(9x2 - 2x +7) +(4x2+7x +2)

9x2 - 2x +7 +4x2 +7x +2

13x2 +5x +9

SSSSS [86.1K]1 year ago
6 0

Answer:

A.  13x2 + 5x + 9

Step-by-step explanation:

use math-way it helps with problems like this

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Joe receives an average of 780 emails in his personal account and 760 emails in his work account each month. After changing his
Semmy [17]

Answer:

702 emails

Step-by-step explanation:

<h2>This problem bothers on depreciation of value, in this context it is Joe's email that has depreciated by 10%.</h2>

Given data

Average personal emails received monthly = 780 emails

Average work emails received monthly= 760 emails

     

      We are required to solve for the new amount of emails Joe will be receiving after changing his address, to find this value we need to solve for the depreciation of his personal mails.

      After solving for the depreciation , we then need to subtract the depreciation from the initial number of mails to get the new number of mails.

let us solve for 10% depreciation.

depreciation= \frac{10}{100} *780\\depreciation=0.1*780= 78 emails

The new number of mails

= initial number of mail- depreciation\\ =780-78= 702 emails

Joe will be receiving an average of 702 emails in his personal account monthly

7 0
2 years ago
What do the differences between the points (as shown on the graph) represent?
Mekhanik [1.2K]

Answer:

They represent the rise and run of the graph.

Step-by-step explanation:

<em>The difference between the x-axis of the points represents the "run" of the graph (or how much you should run along x-axis to get to the next point.)</em>

<em>The difference between the y-axis of of the points represents the "rise" of the graph (or how much you should rise up the y-xis to get to the next point).</em>

The ratio of rise to run is the slope of the graph, which tells us  how many steps should we take on the y-axis for every step we move forward on the x-axis.

8 0
2 years ago
Read 2 more answers
A bag contains 100 marbles which are red, green, and blue. Suppose a student randomly selects a marble without looking, records
ra1l [238]

Answer:

35 red marbles

Step-by-step explanation:

So we can put the different color marbles in a ratio. So 7:2:11. If we add all of those up we get 20. We do 100/20 to get 5. Each number in the ratio is equivalent to 5 marbles. Then we do 7*5 to get 35. We can check our work by doing, (7*5) + (2*5) + (11*5) = 100. And it does equal 100 so the answer is correct.

6 0
2 years ago
Read 2 more answers
The number of nails in the bucket is 50 less than twice a number of screws. Together, there are 400 fasteners in the bucket. How
kati45 [8]

Answer:

There are 250 nails and 150 screws in the bucket.

Step-by-step explanation:

Let Number of nails in bucket be x.

Also Let number of screws in the bucket be y.

Together, there are 400 fasteners in the bucket.

Hence the equation can be framed as;

x+y = 400 \ \ \ \ equation \ 1

Also Given:

The number of nails in the bucket is 50 less than twice a number of screws.

Hence the equation can be framed as;

x= 2y -50

Substituting the value of x in equation 1 we get;

x+y=400\\2y-50+y=400\\3y=400+50\\3y=450\\y= \frac{450}{3}=150

Now we have value of y we will substitute in equation 1 we get;

x+y =400\\x+150 =400\\x =400-150\\x=250

Hence there are 250 nails and 150 screws in the bucket.

3 0
2 years ago
Mr. Nasser asks four of his students to measure four different objects. Here are the results.
umka21 [38]

Answer:

kamusta

Step-by-step explanation:

4 0
1 year ago
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