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3 years ago

How to solve for vertex form y = -x^2 + 4x – 1

Mathematics

1 answer:

Nastasia [14]3 years ago

6 0

Answer: y= -(x-2)^2+3

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Solve for x -4.5(x-8.9)=12.6 enter your answer as a decimal

saveliy_v [14]

Answer:

x = 11.7

Step-by-step explanation:

We have the following equation: -4.5(x-8.9)=12.6

First we divide both parts of the equation by -4.5

Then: (-4.5(x-8.9))/-4.5 = 12.6/-4.5

We get: (x-8.9) = 2.8

Then, solving for x:

(x-8.9) = 2.8 -> x = 2.8 + 8.9 = 11.7

The solution is: x = 11.7

5 0

3 years ago

Use ratio language to describe the relationship of any two things you can think of.

miss Akunina [59]

Answer:

Step-by-step explanation:

the recipe called for 3 cups of flour and 4 cups of sugar. That means there is 3/4 cups of flour for each cup of sugar.

She drove 60 miles in 3hrs. This means she drove 60/3 = 20 miles per hr.

hope this helps?

3 0

3 years ago

On a test, shelly got approximately 93% of the items correct. she got 76 questions right. how many questions were on the test? a

svetlana [45]

You multiply 76 by 0.93. That is 70.68 which rounds to 71. To check, (71/76) = ~93.

8 0

3 years ago

150 students in hostel have food enough for 45 days. After 10 days , 25 students leave the hostel. How much larger will the food

Naddik [55]

Step-by-step explanation:

150=45

150 -25=x

:150=45

125=x

cross multiply

150x/150=5625/150

x=38 days

8 0

3 years ago

The sum of three numbers $x$ ,$y$, $z$ is 165. When the smallest number $x$ is multiplied by 7, the result is $n$. The value $n$

babymother [125]

You're given

x + y + z = 165

7x = n

n = y - 9

n = 9 + z

and you want to find xyz.

Solve the last three equations for x, y, and z :

7x = n → x = n/7

n = y - 9 → y = n + 9

n = 9 + z → z = n - 9

Substitute x, y, and z into the first equation and solve for n :

n/7 + (n + 9) + (n - 9) = 165

n/7 + 2n = 165

n + 14n = 1155

15n = 1155

n = 77

Now solve for x, y, and z :

x = 77/7 = 11

y = 77 + 9 = 86

z = 77 - 9 = 68

Then the product is

xyz = 11 • 86 • 68 = 64,328

6 0

3 years ago