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saveliy_v [14]
3 years ago
12

Doug is in line at the store. He has three items that cost ​$4.50​, ​$3.05​, and ​$1.50. Explain how Doug can add the cost of th

e items mentally before he pays for them.
Mathematics
2 answers:
UNO [17]3 years ago
8 0

Answer: well if i was him i would simply add $4, $3 and $1. then i would add the change 50 cent, 5 cent and 50 cent to get a sum of $9.05

Angelina_Jolie [31]3 years ago
4 0

Answer:

He can add through calculater or by doing addition in his mind

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Find the value of 3a^2+2b, If a=3 and b = 4.<br><br>An explanation would be great.
vichka [17]

Answer:

=35

Step-by-step explanation:

3(3) ^2 + 2(4)

= 3(9) + 8

= 35

Where you see a, substitute with 3 and where you see b, substitute with 4

Just follow the steps above.

8 0
2 years ago
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Diego is building a kitchen table and a coffee table. The legs of a kitchen table must be twice the height of a coffee table and there are 4 legs on each table. He writes the expression 4(2x) + 4(x) to model his building plans. What does 2x represent?

2x represents the height of one kitchen table leg. 2x represents the total height of all four kitchen table legs. 2x represents the height of one coffee table leg.<span> 2x represents the total height of all four coffee table legs.</span>
8 0
3 years ago
A college student took 4 courses last semester. His final grades, along with the credits each class is worth, are as follow: A (
NikAS [45]

Answer:

A college student took 4 courses last semester. His final grades, along with the credits each class is worth, are as follow: A (3), B (4), C (2), and D (3). The grading system assigns quality points as follows: A: 4; B: 3; C: 2; D: 1; and F: 0. Find the student’s GPA for this semester. Round your answer to the nearest thousandth.

another way is

This is a weighted average question. You are going to "weight" each course by the number of credits it is worth and then divide by the total number of credits. In other words, you are going to multiply each grade (A=4, B=3) by the number of credits attached to that grade. This will ensure that the courses that have more credits count more in the overall average. Then you are going to divide by the total number of credits to get the overall GPA.

So,

(3*4 + 4*3 + 2 *2 + 3*1)/(3+4+2+3) = GPA

Step-by-step explanation:

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3 years ago
This is a question about percent change help if you can pls!
Serhud [2]

Answer:

Step-by-step explanation:

\Delta \% =100\left(\frac{final value-initial value}{initial value}\right)\\ \\ \Delta \% =100\left(\frac{2758526-2838233}{2838233}\approx -2.8\%

4 0
3 years ago
Which choice most effectively sets up the
tatiyna

Option D. However, despite its many utilitarian benefits, colleges have not always supported the study of philosophy.

Which choice most effectively sets up the information that follows?

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To know more about reading comprehension, refer:

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