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3 years ago

Please help 20 pts! can't miss it!

Mathematics

2 answers:

ki77a [65]3 years ago

5 0

The best answer is
40
____
3

Readme [11.4K]3 years ago

4 0

The correct answer would be 13 1/3

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What is the value of c in the equation y = 4x^2 -10x + c if the y-coordinate of the vertex is -7

love history [14]

Answer: $c=-\frac{3}{4}$

Step-by-step explanation:

Find the x-coordinate of the vertex with this formula:

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

In this case:

$a=4\\b=-10$

Substituting values, we get:

$x=\frac{-(-10)}{2(4)}=\frac{5}{4}$

Now we can substitute the coordinates of the vertex into the equation $y = 4x^2 -10x + c$ and then solve for "c".

Then:

$-7 = 4(\frac{5}{4})^2 -10(\frac{5}{4}) + c\\\\-7+\frac{25}{4}=c\\\\c=-\frac{3}{4}$

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2 years ago

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61/2×(8/9÷13/18)+(3/4) of 31/5

liberstina [14]

Answer:

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Step-by-step explanation:

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2 years ago

Mimi needs eleven 18-inch pieces of rhinestone ribbonShe purchased 5 yards of the ribbon shown at the rightWhat is the total amo

GalinKa [24]

Answer:

5.5 yards.

Step-by-step explanation:

We have been given that Mimi needs eleven 18-inch pieces of rhinestone ribbon. She purchased 5 yards of the ribbon. We are asked to find the total amount of ribbon that Mimi needs.

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$\text{Amount of total ribbon in inches}=11\times 18\text{ inches}$

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Therefore, the total amount of ribbon that Mimi needs is 5.5 yards.

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Answer:

Step-by-step explanation:

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