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
sesenic [268]
3 years ago
6

Add parenthesis to the expression to equal 7. 3x2+6

Mathematics
1 answer:
lakkis [162]3 years ago
4 0

Answer:

(3times2)+6

Step-by-step explanation:

You might be interested in
3/4 of the clothes in Cecile's closet are shirts. 1/5 are green shirts. What fraction of all the clothes in the closet are green
castortr0y [4]
3/20 of the shirts in her closet
4 0
3 years ago
Read 2 more answers
In a coffee shop, cups of coffee cost 2$ and muffins cost 3$. The maximum amount that you can spend is $18. The equation that re
lions [1.4K]

Answer:

c= 0 m=6

Step-by-step explanation:

0x2= 0

3x6=18

18+0=18$

8 0
3 years ago
What number is missing from the table of equivalent ratios? A) 2 B) 5 C) 7 D) 13 nt
iren [92.7K]
X y
3 6
5 10
7 14   the answer is B
3 0
3 years ago
Read 2 more answers
Let y(t) be the solution to y˙=3te−y satisfying y(0)=3 . (a) Use Euler's Method with time step h=0.2 to approximate y(0.2),y(0.4
OLEGan [10]

Answer:

  • y(0.2)=3, y(0.4)=3.005974448, y(0.6)=3.017852169, y(0.8)=3.035458382, and y(1.0)=3.058523645
  • The general solution is y=\ln \left(\frac{3t^2}{2}+e^3\right)
  • The error in the approximations to y(0.2), y(0.6), and y(1):

|y(0.2)-y_{1}|=0.002982771

|y(0.6)-y_{3}|=0.008677796

|y(1)-y_{5}|=0.013499859

Step-by-step explanation:

<em>Point a:</em>

The Euler's method states that:

y_{n+1}=y_n+h \cdot f \left(t_n, y_n \right) where t_{n+1}=t_n + h

We have that h=0.2, t_{0}=0, y_{0} =3, f(t,y)=3te^{-y}

  • We need to find y(0.2) for y'=3te^{-y}, when y(0)=3, h=0.2 using the Euler's method.

So you need to:

t_{1}=t_{0}+h=0+0.2=0.2

y\left(t_{1}\right)=y\left(0.2)=y_{1}=y_{0}+h \cdot f \left(t_{0}, y_{0} \right)=3+h \cdot f \left(0, 3 \right)=

=3 + 0.2 \cdot \left(0 \right)= 3

y(0.2)=3

  • We need to find y(0.4) for y'=3te^{-y}, when y(0)=3, h=0.2 using the Euler's method.

So you need to:

t_{2}=t_{1}+h=0.2+0.2=0.4

y\left(t_{2}\right)=y\left(0.4)=y_{2}=y_{1}+h \cdot f \left(t_{1}, y_{1} \right)=3+h \cdot f \left(0.2, 3 \right)=

=3 + 0.2 \cdot \left(0.02987224102)= 3.005974448

y(0.4)=3.005974448

The Euler's Method is detailed in the following table.

<em>Point b:</em>

To find the general solution of y'=3te^{-y} you need to:

Rewrite in the form of a first order separable ODE:

e^yy'\:=3t\\e^y\cdot \frac{dy}{dt} =3t\\e^y \:dy\:=3t\:dt

Integrate each side:

\int \:e^ydy=e^y+C

\int \:3t\:dt=\frac{3t^2}{2}+C

e^y+C=\frac{3t^2}{2}+C\\e^y=\frac{3t^2}{2}+C_{1}

We know the initial condition y(0) = 3, we are going to use it to find the value of C_{1}

e^3=\frac{3\left(0\right)^2}{2}+C_1\\C_1=e^3

So we have:

e^y=\frac{3t^2}{2}+e^3

Solving for <em>y</em> we get:

\ln \left(e^y\right)=\ln \left(\frac{3t^2}{2}+e^3\right)\\y\ln \left(e\right)=\ln \left(\frac{3t^2}{2}+e^3\right)\\y=\ln \left(\frac{3t^2}{2}+e^3\right)

<em>Point c:</em>

To compute the error in the approximations y(0.2), y(0.6), and y(1) you need to:

Find the values y(0.2), y(0.6), and y(1) using y=\ln \left(\frac{3t^2}{2}+e^3\right)

y(0.2)=\ln \left(\frac{3(0.2)^2}{2}+e^3\right)=3.002982771

y(0.6)=\ln \left(\frac{3(0.6)^2}{2}+e^3\right)=3.026529965

y(1)=\ln \left(\frac{3(1)^2}{2}+e^3\right)=3.072023504

Next, where y_{1}, y_{3}, \:and \:y_{5} are from the table.

|y(0.2)-y_{1}|=|3.002982771-3|=0.002982771

|y(0.6)-y_{3}|=|3.026529965-3.017852169|=0.008677796

|y(1)-y_{5}|=|3.072023504-3.058523645|=0.013499859

3 0
3 years ago
Write an algebraic expression for the
Vera_Pavlovna [14]

Answer:

<h2>x+4²×3</h2>

<h2>mark me as brainliest</h2>
5 0
2 years ago
Read 2 more answers
Other questions:
  • Find
    8·1 answer
  • A carpenter buys $54.38 worth of parts from a supplier. If he pays for the parts with a $100 bill, how much change will he recei
    12·2 answers
  • What is a triangle with three acute anglwa called
    7·2 answers
  • A train is traveling at a constant speed. The diagram represents the train's distance and time. What is the speed of the train?
    6·2 answers
  • The manufacturers of cans of salted moxies nuts state that the ratio of peanuts to other is 5 to 3. If 360 peanuts are in a can,
    6·1 answer
  • 6th grade math help me plzzz
    7·2 answers
  • There are 165 laptops and desktop computers in a lab. There are 9 more laptops than desktop computers. What is the total number
    7·2 answers
  • Keith borrowed $102 from his dad, and he is paying him back $11 each month
    15·2 answers
  • 7=5y-13-y
    8·1 answer
  • △ABC has vertices A(-2, 0), B(0,8), and C(4,2) Find the equations of the three altitudes of △ABC
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!