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Advocard [28]
3 years ago
7

HELPPPPPP PLEASEEEE HELP HELP

Mathematics
1 answer:
Delvig [45]3 years ago
5 0

Answer:

i believe the answer is 3pi/4

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Reba needs to simplify the expression below. 6 1/2+3.5x2-7 divided by 3 Which operation should she perform first?
Veseljchak [2.6K]

Answer:

mutipication

Step-by-step explanation:

4 0
2 years ago
Give the properties for the equation -2x 2 - y + 10x - 7 = 0.
Sladkaya [172]

Given:

The quadratic equation is

-2x^2-y+10x-7=0

To find:

The vertex of the given quadratic equation.

Solution:

If a quadratic function is f(x)=ax^2+bx+c, then

Vertex=\left(\dfrac{-b}{2a},f(\dfrac{-b}{2a})\right)

We have,

-2x^2-y+10x-7=0

It can be written as

-2x^2+10x-7=y

y=-2x^2+10x-7           ...(i)

Here, a=-2,b=10,c=-7.

\dfrac{-b}{2a}=\dfrac{-10}{2(-2)}

\dfrac{-b}{2a}=\dfrac{-10}{-4}

\dfrac{-b}{2a}=\dfrac{5}{2}

Putting x=\dfrac{5}{2} in (i), we get

y=-2(\dfrac{5}{2})^2+10(\dfrac{5}{2})-7

y=-2(\dfrac{25}{4})+\dfrac{50}{2}-7

y=\dfrac{-50}{4}+25-7

y=\dfrac{-25}{2}+18

On further simplification, we get

y=\dfrac{-25+36}{2}

y=\dfrac{11}{2}

So, the vertex of the given quadratic equation is \left(\dfrac{5}{2},\dfrac{11}{2}\right).

Therefore, the correct option is A.

3 0
2 years ago
a square lawn has a perimeter of 36 meters and a circular exercise run has a circumference of 36 meters which shape will give ri
neonofarm [45]

Answer:

The square lawn.

Step-by-step explanation:

This is because a perimeter of 36 meters means that it is 81 ft^2 of total area.

A circle of 36 meters means that it would be 36/2\pir, which would be smaller that 81 ft^2.

4 0
3 years ago
Read 2 more answers
Is this triangle equilateral? yes​
Doss [256]
You never showed the triangle
6 0
2 years ago
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A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television e
irakobra [83]
The answer is: 

(null hypothesis) u=2.7; Ha(alt hypothesis): u<2.7 
7 0
3 years ago
Read 2 more answers
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