She can use 2x5 because that is the commutative property. commutative property of multiplication states that two numbers can be multiplied in either order, for example, 3x15 can also be multiplied in this way: 15x3. they will both make the same answer: 45
Answer:
-7/5
Step-by-step explanation:
(1-8)/(7-2)= -7/5
Absolutely not because
if you see as fraction
8/7 and 15/16 is not equal at all
if it had to be equal if should've been 16/14
Answer:
![x=3, y = 49\\x=0.5, y = -3.5\\x=-0.67, y = -2.31](https://tex.z-dn.net/?f=x%3D3%2C%20y%20%3D%2049%5C%5Cx%3D0.5%2C%20y%20%3D%20-3.5%5C%5Cx%3D-0.67%2C%20y%20%3D%20-2.31)
Step-by-step explanation:
![y=6x^2-5\\y=17x-\frac{6}{x}](https://tex.z-dn.net/?f=y%3D6x%5E2-5%5C%5Cy%3D17x-%5Cfrac%7B6%7D%7Bx%7D)
Let's substitute the first equation into the second one.
![6x^2-5=17x-\frac{6}{x}](https://tex.z-dn.net/?f=6x%5E2-5%3D17x-%5Cfrac%7B6%7D%7Bx%7D)
- Multiply by
and bring all the terms to one side.
I'll use my graphical calculator to solve this but you could factor:
(All rounded to 2 decimal places)
Now we can substitute these
values into an equation for
.
![y=6x^2 - 5](https://tex.z-dn.net/?f=y%3D6x%5E2%20-%205)
![x=3, y = 49\\x=0.5, y = -3.5\\x=-0.67, y = -2.31](https://tex.z-dn.net/?f=x%3D3%2C%20y%20%3D%2049%5C%5Cx%3D0.5%2C%20y%20%3D%20-3.5%5C%5Cx%3D-0.67%2C%20y%20%3D%20-2.31)
1-10=-9 You could look at a number line and find positive 1 and count downwards to negative 9 to get ten so the answer is
1