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Snowcat [4.5K]
3 years ago
9

I DON'T KNOW WHAT TO DO WITH THIS. HELP

Mathematics
1 answer:
mixas84 [53]3 years ago
6 0
Ok, so since she spent $15 each week for 10 weeks, she spent a total of $150 over those 10 weeks. The best approach I would use for this is cross multiplication. The total percentage of Books and music would be 35% out of 100% because 10+25=35. The answer is b, 50.

Hope this helps :)
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X=2y-1 <br> 3x+4y=11<br> Need help solving
tigry1 [53]

Answer: (-1/5, 2/5)


Step-by-step explanation:

See the photo for explanation and work.


6 0
3 years ago
HELP!!!!! hurry pls ​
valentina_108 [34]

Answer:

100

Step-by-step explanation:

since its collinear it has to be 180 -80 which equals 100.

4 0
3 years ago
What is the y value of the vertex of the function f(x)=-(x-3)(x+11)
AnnyKZ [126]

Answer:

49

Step-by-step explanation:

Because there is a minus sign infront of x-3, we can convert x-3 into the negative form:

- * x

- * -3

-x + 3

Which gives us:

(-x + 3)(x + 11)

Now expand the brackets with the formula:

(a + b)(c + d) = ac + ad + bc + bd

-x * x = -x²

-x * 11 = -11x

3 * x = 3x

3 * 11 = 33

-x² - 11x + 3x + 33

-x² - 8x + 33

The formula for finding the x coordinate of a vertex in a quadratic equation is:

x = \frac{-b}{2a}

Plug known variables in:

x = \frac{-(-8)}{2(-1)}

x = \frac{8}{-2}

x = -4

Now, to find the y coordinate, plug this variable back into the quadratic equation:

-x² - 8x + 33

y = -(-4^2) - (32) + 33\\y = -16 + 32 + 33\\\\

y = 49

So the y coordinate of the vertex is 49.

Hope this helps!

4 0
3 years ago
What is the distance (in units) between points C and D? Round to the nearest hundredth.
daser333 [38]

Answer:

b. 5.66

Step-by-step explanation:

Use pyramtherm theorem.

4^2+ 4^2= c^2

16+16=c^2

32=c^2

Sqaure root of 32= 5.65

Rounding up is 5.66

8 0
3 years ago
Read 2 more answers
HELPPPPPPPPPP- pleaseeee T^T
Luba_88 [7]

Answer:

Step-by-step explanation:

A

8 0
3 years ago
Read 2 more answers
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