All categories

3 years ago

Find all the zeros of the quadratic function. y=x²+x-30

Mathematics

1 answer:

german3 years ago

6 0

Answer:

-6and 5

Step-by-step explanation:

x²+x-30

by factorisation;

(x+6)(x-5)

x+6=0

x=-6

x=5

hope this helps

feel free to ask me questions in the comments section

please like and Mark as brainliest

You might be interested in

A sphere has a volume of 4500 cubic inches. What is the radius off the shpere

Goshia [24]

Answer:

The radius of sphere with volume 4500 cubic inches is 10.24 inches.

Step-by-step explanation:

Let V be the volume of the sphere

Given

Volume of sphere = V = 4500 cubic inches

Let r be the radius of the sphere

The volume of the sphere is given by the formula

$V = \frac{4}{3}\pi r^3$

Putting the known values

$4500 = \frac{4}{3} * \frac{22}{7} * r^3\\4500 = \frac{88}{21} * r^3\\r^3 = \frac{21}{88} * 4500\\r^3 = 1073.8636$

Taking cube root on both sides

$\sqrt[3]{r^3} = \sqrt[3]{1073.8636} \\r = 10.2403$

Rounding off to nearest hundredth

The radius is: 10.24 inches.

Hence,

The radius of sphere with volume 4500 cubic inches is 10.24 inches.

8 0

3 years ago

Ari has a total of 22 coins consisting of pennies and nickels. The total value of the coins is $0.54.

Temka [501]

answer:

B. 0.01p + 0.05(22 – p) = 0.54

(got it correct on edgenuity)

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Lee el texto y sustituye las palabras resaltadas por frases adverbiales que expresen temporalidad

Luda [366]

Answer:

............. ahi esta la respuesta

7 0

3 years ago

Precalculus PLEASE HELP ME right answers only check all please

Alex_Xolod [135]

Given :

$cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=-\frac{\sqrt{2}}{2}$

We know the identity

$cos(x)cos(y) + sin(x)sin(y)=cos(x-y)$

We use this property to simplify the left hand side

So $cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=cos(x - \frac{\pi }{7})$

$cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})$

we know ,

when $cos(x) =-\frac{\sqrt{2}}{2})$ then

$x = \frac{3\pi }{4} , \frac{5\pi }{4}$

For $cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})$

$x - \frac{\pi }{7}= \frac{3\pi }{4} and x - \frac{\pi }{7}= \frac{5\pi }{4}$

Add $\frac{\pi }{7}$ on both sides

$x= \frac{3\pi }{4} + \frac{\pi }{7} and x= \frac{5\pi }{4} +\frac{\pi }{7}$

Finally we add 2npi for general solution

So options C and D are correct

6 0

3 years ago

Please help i’m doing trying to do my gf work please i’ll give you brainliest

otez555 [7]

Answer:

t = 5 seconds h = 128 feet

Step-by-step explanation:

The given equation of the object is :

$h(t)=-16t^2+64t+80$ .....1

When it hits the ground,

h(t) = 0

So,

$-16t^2+64t+80=0\\\\t=-1\ s\ and\ t=5\ s$

The object will hit the ground in 5 seconds.

Now, put t = 1 s in equation (1).

$h(1)=-16(1)^2+64(1)+80\\\\h(t)=128\ ft$

The object is at a height of 128 ft at 1 second.

7 0

3 years ago