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2 years ago

2x2^2 -5x +2 what’s the answer ?

Mathematics

1 answer:

kogti [31]2 years ago

6 0

Answer:

Step-by-step explanation:

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Please help, will give brainlist!

eimsori [14]

Answer:

The answer is B. (2.5,-0.5).

Step-by-step explanation:

You would substitute the ordered pair into the first equation, making it

3(2.5)-(-0.5)=8. So the equation would become 7.5-(-0.5)=8, or 7.5+0.5=8. 8=8 is a true statement.

3 0

3 years ago

A recipe requires 4 cups of flour to make 12 servings and 7 cups of flour to make 21 servings. How many cups of flour is needed

grandymaker [24]

Answer:

Step-by-step explanation:

to get cups to servings multiply by 3

if you need 18 servings then divide by 3

6 0

3 years ago

The equation x^2 + y^2 + 21 = 40 + 18y. What is the radius of this cookie?

trapecia [35]

Answer:

The radius is 10

Step-by-step explanation:

Given

$x^2 + y^2 + 21 = 40 + 18y.$

Required

The radius

Rewrite as:

$x^2 + y^2 - 18y = 40-21$

Subtract 81 from both sides

$x^2 + y^2 - 18y +81= 40-21+81$

Expand

$x^2 + y^2 - 9y - 9y +81= 40-21+81$

Factorize

$x^2 + y( y- 9) - 9(y -9)= 40-21+81$

Factor out y - 9

$x^2 + (y- 9) (y -9)= 40-21+81$

Express as squares

$x^2 + (y- 9)^2= 100$

$x^2 + (y- 9)= 10^2$

The equation of a circle is:

$(x - a)^2 + (y- b)= r^2$

By comparison:

$r^2=10^2$

$r = 10$

6 0

2 years ago

What happens to the equation when y = x becomes y = -x?

notka56 [123]

Well -x is the opposite of x

so i think that it makes the lines perpendicular

7 0

3 years ago

46,145 round to the nearest ten

Aleks04 [339]

Answer:

26,150 is your answer.

Step-by-step explanation:

What you do is you have to look at the number. Since it is a 5, the next number is rounded up and 5 becomes a zero.

26,150 is your answer.

4 0

2 years ago

Read 2 more answers

2x2^2​ ​ -5x +2 what’s the answer ?

2x2^2 -5x +2 what’s the answer ?