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mario62 [17]
3 years ago
6

Which two numbers multiply to 78 and add up to 17

Mathematics
1 answer:
Anarel [89]3 years ago
6 0
There are no numbers without decimals which multiply to 78 and add up to 17.
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Factor 6y^2(y^2+6y+9) completely.
natali 33 [55]

6y^2(y^2+6y+9)\\\\=6y^2(y^2+2\cdot 3 \cdot y   + 3^2)\\\\=6y^2(y+3)^2\\\\=6y^2(y+3)(y+3)

7 0
2 years ago
Find the value of x and y is (3x_6) (12,y-1)​
Alika [10]

Answer:

x=4

y=7

Step-by-step explanation:

12=3x

x=4

6=y-1

y=6+1

y=7

8 0
3 years ago
Read 2 more answers
Simplify the following expres<br> (- 4xy-2) - 5<br> (xy-2)-1
Vedmedyk [2.9K]

Step-by-step explanation:

(- 4xy - 2) - 5(xy - 2) - 1

-4xy - 2 - 5xy + 10 - 1

Solving like terms

-9xy + 7

5 0
3 years ago
Read 2 more answers
A family on vacation records the time in hours) and the distance (in miles) that they travel. The data are shown in the scatter
nata0808 [166]

Answer:

In the first 3.5 hours, the family travelled 175 miles.

Step-by-step explanation:

We have the table:

time (hours)              distance ( miles)

      0                                   0

      1                                   50

       2                                 100

      3                                  150

      4                                 200

      5                                 250

      6                                 300

      7                                 350

      8                                 400

      9                                 450

This seems like a linear relationship, let's write the general line:

y = a*x + b

That represents this situation, y is the distance in miles and x is the time in hours.

In the line equation, a represents the slope and b the y-intercept.

And if the line passes through the points (x₁, y₁) and (x₂, y₂), then the slope of the line is:

a = (y₂ - y₁)/(x₂ - x₁)

In this case we have a lot of points for the line, we can use any pair we want (we actually should use a few different pairs to see that the slope is always the same)

So if we use the first two (0, 0) and (1, 50)

the slope is:

a = (50 - 0)/(1 - 0) = 50

Now, if we use the third and fifth points (4, 200) and (5, 250) now the slope is:

a = (250 - 200)/(5 - 4) = 50/1 = 50

So we can conclude that the slope of the equation is a = 50

Then the equation is something like:

y = 50*x + b

To find the value of b, we can use any of the points of the line, for example (0, 0)

This means that when x = 0, y also must be 0, then:

0 = 50*0 + b

0 = b

Then the equation is:

y = 50*x

Now, to answer how many miles the family travelled in the first 3.5 hours, we just need to replace x by 3.5 in the equation:

y = 50*3.5 = 175

In the first 3.5 hours, the family travelled 175 miles.

6 0
3 years ago
38. Joey paid for 5 hours of batting lessons in March.
Elodia [21]

Answer:

159.75

Step-by-step explanation:

23.50×5=117.5

117.5+42.25=159.75

3 0
3 years ago
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