1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SashulF [63]
3 years ago
12

Evaluate x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3.

Mathematics
1 answer:
White raven [17]3 years ago
8 0

Answer:

Step-by-step explanation:

x^3-2y^2-3x^3+z^4

(3)^3-2(5)^3+(-3)^4

-142

You might be interested in
PLEASEE HELP!!
Alex777 [14]

Answer:

<h2>A)t=6.7</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • quadratic equation
  • quadratic equation word problems
  • solving quadratic
<h3>given:</h3>

h(t) = -4t² + 12t + 100

<h3>to solve:</h3>

t

<h3>tips and formulas:</h3>
  • <u>the</u><u> </u><u>Ball</u><u> </u><u>will</u><u> </u><u>hit </u><u>the</u><u> ground</u><u> </u><u>when</u><u> </u><u>the</u><u> height</u><u> is</u><u> </u><u>0</u>
  • <u>solving</u><u> </u><u>quadratics </u><u>using</u><u> </u><u>quadratic</u><u> formula</u>
  • <u>PEMDAS</u>
<h3>let's solve: </h3>

step - 1 :  \: define

- 4 {t}^{2}  + 12t + 100 = 0

step - 2 :  \\ divide \: both \: sides \: by \:  - 4

{t}^{2}  - 3t - 25 = 0

step - 3 :  \\ solve \: the \: quadratic

formula :  \\ x =  \frac{ - b± \sqrt{ {b}^{2} - 4ac }  }{2a}

define \: a ,b \: and \: c \\ which \: are \: 1, - 3 \: and \:  - 25 \: respectively

t =  \frac{ - ( - 3)± \sqrt{ {( - 3)}^{2} - 4.1. - 25 }  }{2.1}

t =  \frac{  3± \sqrt{ 9    + 100}  }{2}

t = \frac{3 +  \sqrt{ 109 } }{2}

t =  \frac{3  -  \sqrt{ 109 } }{2}

t = 6.7 \\ t =  - 3.7

as \: we \: know \: time \: cannot \: be \: negative

\huge \therefore \: t = 6.7

5 0
3 years ago
Why might a researcher use a sample rather than an entire population for their study?
cestrela7 [59]

Answer:

c

Step-by-step explanation:

its easier to take a group of 100 or something random people than a whole population.

6 0
3 years ago
On cold days Leah likes to make hot chocolate. She uses 8 tablespoons of cocoa and 2 tabelspoons of sugar, what ratio is equival
galben [10]

Answer:

4 to 1

Step-by-step explanation:

The greatest common factor between 8 and 2 is 2. So 2 will go into 8, 4 times. And 2 will go into 2, 1 time. So simplified the equivalent ratio is 4:1.

8 0
3 years ago
What is 5+5-2x4-6+23<br> Please help
Lera25 [3.4K]

Answer:

19

Step-by-step explanation:

thats what the calculator said sheesh sheesh it was really hard

3 0
3 years ago
Read 2 more answers
In the opening scene of the movie Raiders of the Lost Ark, Indiana Jones replaces a golden statue with a bag of sand. The platfo
chubhunter [2.5K]

Answer:

1920π

Step-by-step explanation:

First, you need to find the volume of the statue in terms of pi.

Volume of cylinder formula:

V=πr²h

V=π4²15

V=π16×15

V=240π

Then, you need to find the mass of the statue.

Mass:

Mass= density × volume

Mass=20×240π

Mass=4800π

Now, you need to find the volume. Since the sand has to weigh the same as the statue, the mass is going to stay the same. To find the volume you need to do:

V=mass of sand/density

V=4800π/2.5

That gives you your answer:

1920π

Note: I had to do the exact same problem on Khan Academy. This is right.

3 0
3 years ago
Other questions:
  • PLEASE REALLY NEED HELP!!
    10·1 answer
  • Write the equation 2x-3y=6 in slope intercept form
    7·1 answer
  • What is the square root of 16 over 81
    9·2 answers
  • Graph ​ y=4/7x−2 <br><br> I just need someone to explain where this would go on a graph​.
    15·1 answer
  • Pls help ;c<br><br>I need help on those 3 problems​
    10·1 answer
  • How do you answer this equation?<br> 5a - 12 = 48
    12·1 answer
  • Find the measure of angle A.
    7·2 answers
  • What is the equation of a line with slope<br> -2/3 and a y-intercept of —4 ?
    8·1 answer
  • If the lateral area of a cube is 36 cm2. Find its total area.​
    10·1 answer
  • How much times bigger is 1 to 1/4
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!