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elena-14-01-66 [18.8K]

2 years ago

5

How do you find the vertex of a parabola..?

2 answers:

Tasya [4]2 years ago

4 0

Well you would have to use the formula x= -b/2a to find the value of x and then substitute that value of x in the equation to find y<span />

11111nata11111 [884]2 years ago

4 0

The vertex formula is derived from the completing-the-square process, just as is the Quadratic Formula. In each case, memorization is probably simpler than completing the square.) For a given quadratic y = ax2 + bx + c, the vertex (h, k) is found by computing h = –b/2a, and then evaluating y at h to find k.

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Zack has two savings accounts with the total of $9,000. He withdew 10 percent from one and 60 percent from the other to buy his

klio [65]

The remaining balances in the first and second account are $5805 and $1020 respectively.

<em><u>Explanation</u></em>

Suppose, the initial balance in the first account was $x$ dollar.

As the total amount in two accounts was $9000, so the <u>initial balance in the second account was</u> $(9000-x) dollar$

He withdrew 10% from the first and 60% from the second account to buy the ring which cost $2175. So, the equation will be......

$0.10x+0.60(9000-x)=2175\\ \\ 0.10x+5400-0.60x=2175\\ \\ -0.50x= 2175-5400= -3225\\ \\ x=\frac{-3225}{-0.50}= 6450$

So, <u>the initial balance</u> in the first account was $6450 and in the second account was ($9000 - $6450)= $2550

Thus, the remaining balance in the first account = 90% of $6450 = $(0.90*6450)= \$5805$

and the remaining balance in the second account = 40% of $2550 = $(0.40*2550)=\$1020$

3 0

3 years ago

There are 26 gold fish in the tank at the store. how many ways can ben choose 5?

Lapatulllka [165]

Answer:

5

Step-by-step explanation:

26/5= 5.2

the greatest whole number that can be chosen is 5.

6 0

2 years ago

6 is 10% of what number

LUCKY_DIMON [66]

I hope this helps you

7 0

3 years ago

What is the area of a section of pavement that is 20 ft wide and 70 yd long?

myrzilka [38]

Answer:

A = 4200 ft^2

Step-by-step explanation:

We know the formula for area is

A = l*w

We need to have the same units

convert yd to ft

1 yd = 3ft

Multiply each by 70

70 yds = 210 ft

A = 210 *20

A = 4200 ft^2

6 0

3 years ago

Dont get it wrong, if its wrong i fail, explain how you got your answer

damaskus [11]

Answer: 50.24

Area of a circle is pi times r^2

The r is 1/2 the d

So 8/2 = 4

Pi times 4^2= 50.24

7 0

3 years ago