All categories

3 years ago

Misha wrote the quadratic equation 0=-x2+4x-7 in standard form. what is the value of c in her equation

Mathematics

1 answer:

Masteriza [31]3 years ago

8 0

Answer:

Final answer is c=-7.

Step-by-step explanation:

Given equation is $0=-x^2+4x-7$ .

Now question says that Misha wrote the quadratic equation 0=-x2+4x-7 in standard form. Now we need to find about what is the value of c in her equation.

We know that standard form of quadratic equation is given by $ax^2+bx+c=0$ .

compare given equation with the standard form, we find that -7 is written in place of +c

so that means +c=-7

or c=-7

Hence final answer is c=-7.

You might be interested in

Try to sketch by hand the curve of intersection of the parabolic cylinder y = x2 and the top half of the ellipsoid x2 + 7y2 + 7z

vovikov84 [41]

Plug $y=x^2$ into the equation of the ellipsoid:

$x^2+7(x^2)^2+7z^2=49$

Complete the square:

$7x^4+x^2=7\left(x^4+\dfrac{x^2}7+\dfrac1{14^2}-\dfrac1{14^2}\right)=7\left(x^2+\dfrac1{14}\right)^2+\dfrac1{28}$

Then the intersection is such that

$7\left(x^2+\dfrac1{14}\right)^2+7z^2=\dfrac{1371}{28}$

$\left(x^2+\dfrac1{14}\right)^2+z^2=\dfrac{1371}{196}$

which resembles the equation of a circle, and suggests a parameterization is polar-like coordinates. Let

$x(t)^2+\dfrac1{14}=\sqrt{\dfrac{1371}{196}}\cos t\implies x(t)=\pm\sqrt{\sqrt{\dfrac{1371}{196}}\cos t-\dfrac1{14}}$

$y(t)=x(t)^2=\sqrt{\dfrac{1371}{196}}\cos t-\dfrac1{14}$

$z=\sqrt{\dfrac{1371}{196}}\sin t$

(Attached is a plot of the two surfaces and the intersection; red for the positive root $x(t)$ , blue for the negative)

4 0

3 years ago

X = ? Degrees<br><br> Y= ? Degrees

Dmitry_Shevchenko [17]

Answer:

X = i don't know

Y = 50°

Step-by-step explanation:

dugobdddjcjcfsfhjjgkcfzdd

8 0

2 years ago

While cleaning, Tim discovers eighteen decks of standard playing cards (each deck has 52-cards composed of 13 hearts, clubs, dia

Sidana [21]

Answer:

multiply all off that and get your andser

6 0

3 years ago

How many more people in the world speak Chinese than speak English?

Lelechka [254]

Answer:

The answer is 912 million

Step-by-step explanation:

912 million people speak Chinese in the world than they do English.

6 0

3 years ago

Helppp me out please :)))) i’ll mark as brainlist who ever gets it right :)

shepuryov [24]

Answer:

y=-6

Step-by-step explanation:

8 0

2 years ago