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lawyer [7]
4 years ago
8

What is a+ 7 if a =2.2

Mathematics
1 answer:
balu736 [363]4 years ago
4 0

Answer: 9.2

Step-by-step explanation:

If a=2.2, we substitute it into the equation, a+7.  

2.2+7=9.2

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In order to graph a line your equation must be set equal to y. If I gave you the following equation would you be able to graph i
aliina [53]

Answer:

Step-by-step explanation:

Graphing the equation in the form it is given is eventually hard so we always rewrite the equation in the form of y. Lets rewrite the equation in the form of y.

-6x+12y=9\\12y=6x+9\\\\y=\frac{6x+9}{12} \\\\y=\frac{6x}{12}+\frac{9}{12}  \\\\y=\frac{1}{2}x+\frac{3}{4}

now if we compare it to our slope-intercept form which is

y=mx+b

m is the slope which is 1/2 which tells us that if the slope is positive the graph is a positive slope means that two variables are positively related that is, when x increases so does y, and when x decreases y also decreases. Graphically, a positive slope means that as a line on the line graph moves from left to right, the line rises, and b is the y-intercept which is 3/4.

Intercept means where the line intersects the specific axis. In this case b is y-intercept which is 3/4 which means the line intersects the y-axis at 3/4

so we have our first point (0 , 3/4)

now in order to graph the line we need one more point that is the x-intercept which means where the line would intersect the x-axis the coordinate would be (x , 0) so lets insert this coordinate into our equation that we rewrote above.

y=\frac{1}{2}x+\frac{3}{4}  \\\\0=\frac{1}{2}x+ \frac{3}{4}\\\\-\frac{3}{4}=\frac{1}{2} x\\\\-6=4x\\\\\frac{-6}{4}=x   \\\\x=\frac{-3}{2}

so our x-intercept is (-3/2 , 0)

Below I have attached the graph file you check it out for better understanding

8 0
3 years ago
the campus bookshop sells exercise books and textbooks, where, the total cost of 10 exercise books and 2 textbooks is $1400.00.
vovikov84 [41]

Answer:

The price of 1 exercise book is $122.45.

Step-by-step explanation:

This question is solved using a system of equations.

I am going to say that:

x is the price of one exercise book.

y is the price of one textbook.

Total cost of 10 exercise books and 2 textbooks is $1400.00.

This means that:

10x + 2y = 1400

Since we want x:

2y = 1400 - 10x

y = 700 - 5x

One also finds the total cost of 3 textbooks and 30 exercise books is $3000.

This means that:

3x + 30y = 3000

Since y = 700 - 5x

3x + 30(700 - 5x) = 3000

3x + 21000 - 150x = 3000

147x = 18000

x = \frac{18000}{147}

x = 122.45

The price of 1 exercise book is $122.45.

4 0
3 years ago
Which of the following sets of ANGLE MEASURES could NOT form a triangle?
iogann1982 [59]

Answer:

the answer is 45,85,40

Step-by-step explanation:

Add all angles if it equals 180 it is a triangle if under or over it is not an angle

7 0
3 years ago
jenette ordered a large bucket of popcorn at the movies.the graph shows the amount of popcorn in her bucket over time
Elenna [48]

Answer:

A

Step-by-step explanation:

5 0
2 years ago
Can you please answer my question?
OLga [1]
Add 45 to X (?h) and 2mi to 1mi. It should look like this:
45min + X = 3mi
next you subtract 45 on both sides and get X = -42


hope this helps :)
8 0
4 years ago
Read 2 more answers
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