The question says evaluate 2a-b/b when a=4 and b=-3.
How would I start this problem?

Answers

Answer 1

Answer: You would start by writing down the expression that you have to evaluate:

2a - b/b

Then, get to work:
-- Wherever you see 'a', put in 4 .
-- Wherever you see 'b', put in -3 .

2(4) - (-3/-3)

Can you handle that ?

Hint:
The thing on the right is a fraction with the same number on top and bottom.
Any fraction like that is always equal to ' 1 '.

Answer 2

Answer: $(2a-b)/(b)\n\nsubstitute\ a=4;\ b=-3:\n\n(2\cdot4-(-3))/(-3)=(8+3)/(-3)=-(11)/(3)=-3(2)/(3)$

$or\ if\ 2a+(b)/(b)=2a+1\ then\ for\ a=4\ and\ b=-3:\n\n2\cdot4-3=8-3=5$

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Every week Sarah collects a few pounds of cans to recycle. The graph below shows the total number of pounds of cans (y) that Sarah collected in a certain amount of time (x), in weeks: A graph titled Can Recycling is shown with labels in x axis and y axis as Number of Weeks and Amount of Cans Collected in pounds, respectively. The values on the x axis are from 0 to 5 at increments of 1, and the values on the y axis are from 0 to 100 with increments of 20. Dots are made at 0, 20 and 1, 40 and 2, 60 and 3, 80 and 4, 100. A straight line joins the ordered pairs 0, 20 and 4,100.

What would most likely be the total amount of cans, in pounds, Sarah would collect in 10 weeks?

200
220
320
420

Answers

Answer:

The amount of cans, in pounds,Sarah would collect in 10 weeks is:

220

Step-by-step explanation:

The x and y value as according to the information are as follows:

x (Number of weeks) y(Amount of cans collected)

0 20

1 40

2 60

3 80

4 100

Hence, we see that with each increasing weeks the number of cans collected increased by a constant rate i.e. 20

The equation that represent these points are:

y=20(x+1)

Now we have to calculate the value of y when x=10

when x=10 we have:

y=20(10+1)

y=20×11

y=220

Hence, the answer is: 220

Answer:

the answer is 220 I got it right on flvs

Step-by-step explanation:

y=20x+20

y=20(10)+20

y=200+20

y=220

What is the slope of a line that is perpendicular to the line y=-1/3x-6OA. 3
OB. 1/3
OC. -1/3
O D. 3

Answers

Answer:

Step-by-step explanation:

3 is the complete oposite of -1/3 in terms of slopes, therefore they are perpendicular to each other.

Mrs. Colen took a trip. She drove 350 miles in 7 hours and 30 minuets. what is her average speed to the nearest tenth of a mile per hour

Answers

diatance travelled by her= 350 miles
amount of time taken by her to travel 350 miles= 7 hrs 30 mins
=450 mins
average speed travelled by her to the nearest tenth of a mile per hour= 450*60/100
=270/10
=27
therefore he travelled 27 miles to the nearest tenth of a mile per hour.

7 hours and 30 minutes is 7.5 hours. Average speed can be found by taking distance and dividing it by time. 350 miles/7.5 hours=46.6666 miles per hour. Rounded to the nearest 10th that is 46.7 mi/hr

Solve by the multiplication of equality 5/49*x = 20/7

Answers

5/49(x) = 20/7
5x/49 = 20/7
5x/49 × 49  = 20/7 × 49
5x  = 140
5x / 5  = 140 / 5
x = 28

Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

Answers

$x^2 + 7x + 8 = 0\n \na=1, \ b=7 ,\ c=8 \n \n x_(1)=(-b-√(b^2-4ac))/(2a)=(-7-√(7^2-4 \cdot 1\cdot 8))/(2 \cdot 1)=(-7-√(49-32))/(2)=(-7-√(17))/(2)\n \nx_(2)=(-b+√(b^2-4ac))/(2a)=(-7+√(7^2-4 \cdot 1\cdot 8))/(2 \cdot 1)=(-7+√(49-32))/(2)=(-7+√(17))/(2)$

Answer:

Step-by-step explanation:

Simplify 6 - (-2) - 3(-5).
-11
-7
19
23