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
Levart [38]
3 years ago
12

Which expression is equivalent to 4(3n-5)?A.7n - 9B.7n - 20C.12n-5D.12n-20​

Mathematics
1 answer:
Archy [21]3 years ago
6 0

Answer:

D. 12n-5

Step-by-step explanation:

you will do 4 times 3n and you will get 12n then you will do 4 times -5 and you will get -20 and then finally you will have 12n-5 (Distribute)

You might be interested in
A ball is thrown from an initial height of 1 meter with an initial upward velocity of 11 m/s. The ball's height h (in meters) af
bonufazy [111]

Answer:

t=0.64 and t=1.56 seconds

Step-by-step explanation:

h=1+11t-5t^2\\\\6=1+11t-5t^2\\\\0=-5+11t-5t^2\\\\0=-5t^2+11t-5\\\\t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\ \\t=\frac{-11\pm\sqrt{11^2-4(-5)(-5)}}{2(-5)}\\\\t=\frac{-11\pm\sqrt{121-100}}{-10}\\ \\t=\frac{-11\pm\sqrt{21}}{-10}\\\\t=\frac{11}{10}\pm\frac{\sqrt{21}}{10}\\ \\t_1\approx0.64\\\\t_2\approx1.56

Therefore, the values of t for which the ball's height is 6 meters is t=0.64 and t=1.56 seconds.

4 0
2 years ago
Can anyone please help me on this Math problem? I am desperate!
salantis [7]
Not sure on the graph, but I have an equation in Standard Form for you. Hope this helps! Message me with any questions!

8 0
4 years ago
I need help asap!!
KiRa [710]

Answer:

area= 83

Step-by-step explanation:

the formula for area of a tringale is HxB/2 so the area for the tringles are 28 and 15 and area for a rectangle is LxW so it is 40 and add it all togeteher and you get 83

6 0
3 years ago
What is the value of x?<br><br> Enter your answer in the box.<br><br> x=
Neporo4naja [7]

Answer:

x=19

Step-by-step explanation:

Set both equal to each other and then solve for x

7 0
3 years ago
Consider the polynomials p(x) = 3x + 27x^2 and q(x)= 2 . Find the x -coordinate(s) of the point(s) of intersection of these two
Tom [10]

Answer:

The x -coordinate(s) of the point(s) of intersection of these two polynomials are x=\frac{2}{9}\approx0.2222,\:x=-\frac{1}{3}\approx-0.3333

The sum of these x -coordinates is \frac{2}{9}+\left(-\frac{1}{3}\right)=-\frac{1}{9}

Step-by-step explanation:

The intersections of the two polynomials, p(x) and q(x), are the roots of the equation p(x) = q(x).

Thus, 3x + 27x^2=2 and we solve for x

3x+27x^2-2=2-2\\27x^2+3x-2=0\\\left(27x^2-6x\right)+\left(9x-2\right)\\3x\left(9x-2\right)+\left(9x-2\right)\\\left(9x-2\right)\left(3x+1\right)=0

Using Zero Factor Theorem: = 0 if and only if = 0 or = 0

9x-2=0\\9x=2\\x=\frac{2}{9}

3x+1=0\\3x=-1\\x=-\frac{1}{3}

The solutions are:

x=\frac{2}{9}\approx0.2222,\:x=-\frac{1}{3}\approx-0.3333

The sum of these x -coordinates is

\frac{2}{9}+\left(-\frac{1}{3}\right)=-\frac{1}{9}

We can check our work with the graph of the two polynomials.

4 0
4 years ago
Other questions:
  • What is the sum of (2+4i) and (7+11i)
    15·2 answers
  • Which statement is true about the sides
    11·2 answers
  • M+4=17 May you guys please help me?
    10·1 answer
  • So I need to calculate the surface area for each figure. And the base is 6 and Side is 3?
    6·1 answer
  • Some of the steps for completing the square to solve
    7·1 answer
  • 1) At McKay's Motorbike Store, a dirt bike has been marked down 25% off the
    9·1 answer
  • Can someone really help me please
    7·2 answers
  • Pa pahelp po dito please​
    10·1 answer
  • Can u help with it plz I really need help ​
    15·1 answer
  • If the parallelogram is reflected across the x-axis, what are the coordinates of point B after the reflection? Please hurryyyy‼️
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!