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Wittaler [7]
2 years ago
9

Please answer the questions

Mathematics
1 answer:
Aleksandr [31]2 years ago
7 0

Answer:

7. -2/6

11. 4³× 2³=8⁶

12. true.....not sure tho

13. nothing can be divideed by 0

14 . true

the only ones i know

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Solve 3x-2y=15 for y?
Nikitich [7]

Answer:

y=3x-15

Step-by-step explanation:

3x-2y=15

   +2y +2y

3x=15+2y

-15 -15

y=3x-15

7 0
3 years ago
How do you solve 6) n2+7n+15=5 by factoring?
charle [14.2K]
First, you need to set the equation equal to zero:

n^2 + 7n + 10 = 0

Now we factor. We need to find two numbers that add up to 7 and multiply to 10. 

2 + 5 = 7
2 * 5 = 10

Now, we just need to write this as a polynomial:

(n + 2) (n + 5)
is our answer. 

Hope this helps!
8 0
3 years ago
A passenger car weighs 4.5 times 10 Superscript 3 units. Which unit of measure was used?
Pepsi [2]
20? I’m not for sure maybe look in the book? That’s the answer I got and it was right
5 1
3 years ago
Read 2 more answers
Josh has been running for 6 min and completes a lap in 7 min. Gabe has been running for 2 min and completes a lap in 9 min.
Amanda [17]
So j completed 6/7 of a lap
gabe has completed 2/9 lap
so
1 j lap=7 mins s o
7j
j=num of laps
1 g lap=9 mins so
9g
g=num of laps
then 6+j
and g+2

so
when will the times be equal
7j+6=9g+2
subtract 2 from both sides
7j+4=9g
divide both sides by 9
7/9j+4/9=g
so to get a whole number of laps, we must subsitute a number when it is multiplied by 7 then add 4, we get a multiplue of 9
so if j=2
7/9(2)+4/9=g=14/9+4/9=g=18/9=g=2
so josh and gabe must run 2 lap each because
6+(2 times 7)=2+(9 times 2)
6+14=2+18
20=20
true so

the answer is 2 laps
3 0
3 years ago
Read 2 more answers
The dimensions of a rectangle can be given by x+7 and x+2. If the area of the rectangle is 66 square inches, what are the dimens
Nadusha1986 [10]

to solve  for the dimensions (x+7)(x+2)=66,

we can first use the foiling method to simplify the left side.

x^2 + 2x + 7x + 14 = 66

x^2 + 9x + 14 = 66

now, subtract 66 from both sides.

x^2 + 9x - 52 = 0

now, split this into two parentheses.

(x + 13)(x - 4)

since the root of -13 would give you negative values, x=4. This means that the dimensions of the rectangle are 11 and 6.

7 0
3 years ago
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