Answer:
What makes graphing linear inequalities in two variables different from graphing linear equations in two variables?
The graph of linear inequalities include a dashed line if they are greater than or less than but not equal to. Linear equations, on the other hand, include a solid line in every situation. Moreover, linear inequalities include shaded regions whereas linear equations do not.
Step-by-step explanation:
What is the mean of 68,75,72,90,80
Answer: 77
Step-by-step explanation:
Answer please please please!!!
Answer:
C
Step-by-step explanation:
katie collected 470 cans the first week of the school project. The second week she collected 105 less than the first week. How many cans did she collect in the second week.
Answer:
Katie collected 365 cans in the second week.
Step-by-step explanation:
Because Katie collected 470 cans in the first week, and 105 less in the second week, we know to subtract 105 from 470, which gives us 365 cans.
2. If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation
6x - y - 1
4x - 3y = -11
04-6x + 1) - 3y = -11
04(6x + 1) - 3y = -11
4x - 3(6x - 1) = -11
4x - 3(-6x - 1) = -11
Answer:
4x - 3(6x - 1) = -11
Step-by-step explanation:
Solving the first equation for y, we get ...
6x -y = 1 . . . . . given
6x -1 = y . . . . . add y-1 to both sides
Then, filling in for y, we have ...
4x -3y = -11 . . . given
4x -3(6x -1) = -11 . . . . using 6x-1 in place of y . . . matches 3rd choice
What is an equivalent expression to 4(4a+5)?
Answer:
4(4a+5)
16a+20
Step-by-step explanation:
4×4a=16a
4×5=20
CAN SOMEONE HELP ME PLEASE ASAP!!!!!!
Answer:
12 in.
Step-by-step explanation:
Formula: a^2 + b^2 = c^2
This case: c^2 - a^2 = b^2
1) 15^2 + 9^2 = b^2
2) 225 - 81 = 144
3) [tex]\sqrt{144[/tex] = 12
2x squared + x - 3 = 0
solve by the quadratic formula and simplify! please help it’s like a week late
Step-by-step explanation:
_______________________________________
[tex]2 {x}^{2} + x - 3[/tex]
Write the equation
_______________________________________
[tex] = 2 {x}^{2} + 3x - 2x - 3[/tex]
expand x into 3x and -2x
_______________________________________
[tex] = x(2x + 3) - (2x + 3)[/tex]
take x out and 2x+3 in bracket and take - out and 2x+3 in brackets
_______________________________________
[tex] = (2x + 3)(x - 1)[/tex]
_______________________________________
hope it helped you:)
What's -6k + 7k and how do I solve it????
Answer: +1k
Step-by-step explanation: In order for you to be able to add two terms together, the terms need to be exactly the same except for the coefficients.
Here, since both terms contain a k, we can add them together.
So -6k + 7k simplifies to +1k.
Note that if you had said k,
that's also an acceptable answer.
Factor Completely.
x^4-81
Answer:
(x^2+9)(x+3)(x-3) or the 3rd bubble (2nd to last).
Step-by-step explanation:
a2−b2=(a+b)(a−b)a2-b2=(a+b)(a-b) where a=x2a=x2 and b=9b=9.
(x2+9)(x+3)(x−3)
1-sina/cosa=cosa/2-sina/2÷cosa/2+sina/2
Step-by-step explanation:
Let's take the RHS,
we've,
(Cosa/2 - sina/2)(Cosa/2 + sina/2)Let's Rationalise the Denominator.
we get,
(Cosa/2 - sina/2)^2(cosa/2)^2 - (sina/2)^2The numerator is in form of (a-b)^2 and the denominator is in form of a^2-b^2. Now,
By formula,
(Cosa/2)^2 -2cosa/2.sina/2 + (sina/2)^2 cosaHere I substituted Cosa in place of (Cosa/2)^2 - (sina/2)^2 because it's the formula of cosa in sub multiple angle form.
In the numerator,(sina/2)^2 + (Cosa/2)^2 =1.........( by formula)
so we have,
1 - 2sina/2.cosa/2Cosa1 - sina {because 2sina/2.cosa/2=sina)CosaLHS proved.
Thank You.
how can you make -4 a fraction
Answer:
You could put it over 1. Like this:
-4/1
Step-by-step explanation:
Answer:
-4/1 or -16/4
Step-by-step explanation:
if you have a negative fraction, the anwer will me negative.
7. A mechanical device is used to launch a potato vertically into the air. The potato is launched from a platform 20 feet above the ground, with an
initial vertical velocity of 92 feet per second. The function h(t) is shown
below. Which of the following statement is TRUE? Select ALL that apply.
1. The potato was launched from the ground.
2. The flight is symmetric about the line t = 2.
3. The potato reaches a maximum height of about 3 ft
4. The potato is in the air during the interval 0
5. The potato reaches its maximum height after about 3 seconds in flight.
6. h(2)=h(5)
Answer:
See below
Step-by-step explanation:
Answer choices:
1. The potato was launched from the ground.
False. 20 feet above the ground2. The flight is symmetric about the line t = 2.
False. Line of symmetry is t=33. The potato reaches a maximum height of about 3 ft
False. Maximum height is about 150 ft4. The potato is in the air during the interval 0
Unclear. no interval given5. The potato reaches its maximum height after about 3 seconds in flight.
True6. h(2)=h(5)
False. h(2) = 140 ft, h(5) = 80 ftmary bought fifteen dozen eggs from the grocery store to bake some cakes. she plans to bake the cakes over two days. how many eggs did mary buy?
Answer:
She bought 180 eggs.
PLEASE HELP FAST PLEASE I BEG YOU
step 1: given
step 2: distributive property
step 3: addition property of equality
step 4: division property of equality
i'm pretty sure....
Answer:
4(3x distributive property
12x - subtraction property of equality
12 = multiplication property of equality
x=7 division property of equality
Two angles are supplementary .One angle has a mesure 2 times the other angles. What are the measures of each angles
Answer:
90 degrees each
Step-by-step explanation:
Let's go!
One angle has a mesure 2 times the other angle
that is x+y=180
where y=2x
x+2x=180
3x=180
x=180/3
x=90.
x+y=180
90+90=180
As required
3x - x - 5 = 2(x + 2) - 9 no solution
Answer:
Indefinate Solutions
Step-by-step explanation:
3x - x - 5 = 2(x + 2) - 9
3x - x - 5 = 2x + 4 - 9
3x - x - 2x = 4 - 9 + 5
0 = 0
I hope this helped.
The value of the solid's surface area is equal to the value of the solid's volume. Find the value of x. We know the length is 9 and the width is 4, but the height is x
Given:
The value of the solid's surface area is equal to the value of the solid's volume.
Length(l) = 9 units
width(b) = 4 units
Height(h) = x units
To find:
The value of x.
Solution:
Solid's surface area is
[tex]Area=2(lb+bh+hl)[/tex]
[tex]Area=2(9\times 4+4\times x+x\times 9)[/tex]
[tex]Area=2(36+4x+9x)[/tex]
[tex]Area=2(36+13x)[/tex]
[tex]Area=72+26x[/tex]
Volume of solid is
[tex]Volume=l\times b\times h[/tex]
[tex]Volume=9\times 4\times x[/tex]
[tex]Volume=36x[/tex]
Solid's surface area = Volume of solid
[tex]72+26x=36x[/tex]
[tex]72=36x-26x[/tex]
[tex]72=10x[/tex]
Divide both sides by 10.
[tex]7.2=x[/tex]
Therefore, the value of x is 7.2.
please answer this for me
Antony works at a local clothing store. He can earn either $600 per month plus a %5 commission or $450 per month and a %7 commission. Write and solve a system of equations that you could use to determine the amount of merchandise that Antony would need to sell in order to earn the same amount of money for each pay scale.
Answer:
The indifference point is $7,500 in sales.
Step-by-step explanation:
Giving the following information:
He can earn either $600 per month plus a %5 commission or $450 per month and a %7 commission.
First, we need to structure the total income formula:
Total income 1= 600 + 0.05x
Total income 2= 450 + 0.07x
x= sales
Now, we need to equal both equations and isolate x:
600 + 0.05x = 450 + 0.07x
150= 0.02x
150/0.02= x
x= $7,500
The indifference point is $7,500 in sales.
What is the answer to this question
Answer:
x=-6
Step-by-step explanation:
(3/1*1/3)=1
-2*3=-6
x=-6
find the equation of the line that passes through (9,14) and is perpendicular to y= 1/3x-5
Answer:
[tex]y=-3x+41[/tex]
Step-by-step explanation:
Equation of a Line
A line of slope m and y-intercept b can be expressed by the equation:
[tex]y=mx+b[/tex]
We are given a line with the equation:
[tex]y=1/3x-5[/tex]
The slope of this line is m1=1/3. To find the slope m2 of a line perpendicular to this one, we use the following equation:
[tex]m_1.m_2=-1[/tex]
Solving for m2:
[tex]\displaystyle m_2=-\frac{1}{m_1}[/tex]
[tex]\displaystyle m_2=-\frac{1}{\frac{1}{3}}=-3[/tex]
Once found the new slope, the required equation has the form:
[tex]y=-3x+b[/tex]
To find b, we use the point (9,14) through which the line passes:
[tex]14=-3(9)+b[/tex]
[tex]b=14+27=41[/tex]
Thus the equation of the line is:
[tex]\boxed{y=-3x+41}[/tex]
Calculate this reflection of the triangle:
1 Го зого а ь
x
0 -1 0 0 2 0 O ed
a =
b =
C =
d =
PLEASE HURRYYY
Answer:
a = 3, b = 0, c = 0, d = -2
Step-by-step explanation:
To find the reflection Multiply the matrices
∵ The dimension of the first matrix is 2 × 2
∵ The dimension of the second matrix is 2 × 3
1. Multiply the first row of the 1st matrix by each column in the second matrix add the products of each column to get the first row in the 3rd matrix.
2. Multiply the second row of the 1st matrix by each column in the second matrix add the products of each column to get the second row of the 3rd matrix
[tex]\left[\begin{array}{ccc}1&0\\0&-1\end{array}\right][/tex] × [tex]\left[\begin{array}{ccc}0&3&0\\0&0&2\end{array}\right][/tex] = [tex]\left[\begin{array}{ccc}(1*0+0*0)&(1*3+0*0)&(1*0+0*2)\\(0*0+-1*0)&(0*3+-1*0)&(0*0+-1*2)\end{array}\right]=\left[\begin{array}{ccc}0&3&0\\0&0&-2\end{array}\right][/tex]
Compare the elements in the answer with the third matrix to find the values of a, b, c, and d
∴ a = 3
∴ b = 0
∴ c = 0
∴ d = -2
Answer:
Step-by-step explanation:
I need helpppp plssss
Here are the ages (in years) of 12 professors at a college.
43, 29, 64, 41, 31, 35, 64, 57, 54, 38, 27, 72
What is the percentage of these professors who are younger than 33?
Answer:
25%
Step-by-step explanation:
12 professors
3 professors younger than 33
3/12 x 100 = 25%
find the equation of the line in slope-intercept form. e through (−5, 6) with slope = 3
Answer:
Step-by-step explanation:
y - 6 = 3(x + 5)
y - 6 = 3x + 15
y = 3x + 21
ased on the data, which table shows a proportional relationship? 4 tables with 2-columns and 3 rows. Column 1 is labeled Oranges and Column 2 is labeled Cups of Juice. Table A has column 1 entries 3, 4, 5. Column 2 entries are 1, 2, 3. Table B has column 1 entries 3, 6, 9. Column 2 entries are 1, 2, 3. Table C has column 1 entries 3, 3, 3. Column 2 entries are 1, 2, 3. Table D has column 1 entries 3, 5, 7. Column 2 entries are 1, 2, 3.
Answer:
Step-by-step explanation:
table B
Answer:
B
Step-by-step explanation:
Which of them is correct?
Answer:
Option A is right because when you multiply the parentheses for all the 4 options, only option A gives the right value to the question.
Given that F(x) = x 2 + 2, evaluate F(1) + F(5).
Answer:
F(1)= (1)2 + 2
2+2
=4
F(5)= (5)2 + 2
10+2
=12
F(1) + F(5) = 12+4
=16
Step-by-step explanation:
:D
I WILL GIVE YOU BRIANLIEST
3= less than because the square root of 8 is 2.82842712475
4= 3.7417
5 20.833333333333
if i am 10 ft tall and my mom is 15.4 ft taller than me how tall is my mom?
Answer:
25.5 ft
Step-by-step explanation:
I dont think humans can be that tall. lol