Answer:
2a + 7
Step-by-step explanation:
-3a + 7 +5a
subtract the negative 3 from the 5
2a + 7
Answer: it would be 2a+7
Step-by-step explanation: Hope this help :D
A laptop carry bag cost $30. The total cost will include an 8% sales tax. Which expression can be used in calculating the total cost with tax?
A. 0.8(30)
B. 1.08 (30)
C. 0.08 (30)
D. 1.8 (30)
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the time that the rocket will hit the ground, to the nearest 100th of second.(Quadratic Word Problems (Profit/Gravity)
y=-16x^2+121x+83
Answer:
The rocket will hit the ground after about 8.20 seconds.
Step-by-step explanation:
The height of the rocket y, in feet, x seconds after launch is modeled by the equation:
[tex]y=-16x^2+121x+83[/tex]
We want to find the time at which the rocket will hit the ground.
If it hits the ground, the height of the rocket y will be 0. Thus:
[tex]0=-16x^2+121x+83[/tex]
We can solve for x. Factoring (if possible at all) or completing the square can be tedious, so we can use the quadratic formula:
[tex]\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]
In this case, a = -16, b = 121, and c = 83. Substitute:
[tex]\displaystyle x=\frac{-(121)\pm\sqrt{(121)^2-4(-16)(83)}}{2(-16)}[/tex]
Simplify:
[tex]\displaystyle x=\frac{-121\pm\sqrt{19953}}{-32}[/tex]
Divide everything by -1 and simplify the square root. The plus/minus will remain unchanged:
[tex]\displaystyle x=\frac{121\pm3\sqrt{2217}}{32}[/tex]
Therefore, our two solutions are:
[tex]\displaystyle x=\frac{121+3\sqrt{2217}}{32}\approx 8.20\text{ or } x=\frac{121-3\sqrt{2217}}{32}\approx -0.63[/tex]
Since time cannot be negative, we can ignore the second solution.
Therefore, the rocket will hit the ground after about 8.20 seconds.
Please show all work and first right answer gets brainly.
Answer:
im not good with math sorry :(
Step-by-step explanation:
3 3/4 x 4
Help me pas
Answer:
15 (C)
//msg added cus it was short//
what is the difference between rational or irrational numbers
Answer:
In rational numbers, both numerator and denominator are whole numbers, where the denominator is not equal to zero. A irrational number is a number which cannot be expressed in a ratio of two integers
Step-by-step explanation:
-4(-2)+(-12)÷(+3)+-20+(+4)+(-6)
Answer:
-18
Step-by-step explanation:
[tex]-4(-2)+\frac{(-12)}{+3}-20+(+4)+(-6)=8-\frac{12}{3}-20+4-6=8-4-20+4-6=-18[/tex]
Answer:
-18Step-by-step explanation:
-4(-2)+(-12)÷(+3)+-20+(+4)+(-6). [B.E.D.M.A.S rule] (First bracket)
= 8 - 12 ÷ 3 - 20 + 4 - 6. (Then division)
= 8 - 4 - 20 + 4 - 6. (Then after addition)
= 8 + 4 - 4 - 20 - 6
= 12 - 30. (At last subtraction)
= -18 (Ans)
Note Figure is not drawn to scale.
If r= 2 cm and h = 2 cm, what is the surface area,
in terms of r?
Answer:
your answer is...
Step-by-step explanation:
50.265482457437
I used my calculator
What’s the answer for TS? (Arc measure)
NO LINKS!
angle TS = 74°
Straight line is 180°, so add PT and SR
(64+42 = 106)
Subtract 180 from 106, you get 74 :)
Answer and explanation
Answer:
392in
Step-by-step explanation:
find the areas of all the sides of this shape. Of one you might have to split it into two shpaes.
Diana finished 5/8 of her homework. what percentage is equivalent to the fraction of homework that Diana completed
Answer:62.5%
Step-by-step explanation:
80% of a number is x. What is 100% of the number? Assume x > 0.
Answer:
Here's a calculator link hope it helps : )
Step-by-step explanation:
https://www.mathpapa.com/algebra-calculator.html
Multiple Choice Question Find the y-value when x = 0 in the equation y= 2x + 3. A. 5 B. 2 C. 3 D. 1
Answer: C.
brainliest plz
Step-by-step explanation:
y=2x+3
substitute in x
y=(2*0)+3
y=0+3
y=3
PLEASE HELP!!!
This graph shows the relationship between demand and price for goods sold at a shop. Anna plots the data on a scatter plot and draws a line of best fit to represent the relationship as shown.
This is not the line of best fit because the line ____________.
A.) Is close to the data points
B.) does not fit every data point exactly.
C.) Is not through the middle of the data points.
Anna could get a better fit by _____
A.) Decreasing
B.) Increasing
C.) Keeping
the y-intercept and ______ the slope.
A.) Decreasing
B.) Increasing
C.) Keeping
Answer:
1st question: C
2nd question: Increasing (the slope)
3rd question: don't understand what's being asked
Step-by-step explanation:
Answer:
the answers are
Step-bythe answers are -step explanation:
1.C
2.a
3.B
Hello! Sorry about My last question! I was lying this is just a Homework assignment and it is completion Credit but if you do it I will still give you the brainliest!
To find the percent of something, turn the percent into a decimal and multiply (move the decimal place 2 places left, e.g. 53% = .53)
Module 19 - Reflections
Assignment Active
Practice working with reflections.
Assignment
y
M(-5, 4)
M'(5, 4)
What is the rule for the reflection?
ry-axis(x, y) - (x, y)
P'y-axis(x, y) - (x,-y)
* rx-axis(x, y) (-x, y)
Orx-axis(x, y) = (x,-y)
2
L(-6,2)
N(-3,2)
N'(3,2)
L'(6,2)
x
-2
2
-2
Answer:
R y-axis (x,y) to (-x,y)
Step-by-step explanation:
The rule for reflection is [tex]r_y[/tex] axis (x, y) -> (-x, y).
What is Transformation?A transformation is a broad phrase covering four distinct methods of changing the shape and/or position of a point, line, or geometric figure.
The original shape of the object is known as the Pre-Image, and the final shape and location of the object is known as the Image during the transformation.
As per the figure. the coordinates of Triangle LMN are
L(-6, 2),
M(-5, 4)
N(-3, 2)
and, the coordinates of Triangle L'M'N' are
L'(6, 2),
M'(5, 4)
N'(3, 2)
Here, the y coordinate is same only the sign of x coordinate change.
So, the rule for reflection is r y- axis (x, y) -> (-x, y).
Learn more about Transformation here:
https://brainly.com/question/13801312
#SPJ7
PLEASE HELP ASAP ILL MARK BRAINLY IF U DO
Answer:
34.1 is the answer by Pythagoras thereom
Help me please!!!!!!!!!!!!!!
Answer: reflection over the y axis
Step-by-step explanation:
PLEASE HEEEEEELP!!
Answer:
1 is 105°
2 is 75°
Step-by-step explanation:
75° and angle 2 are corresponding angles(equal)
angles on straight line sum up to 180°
let x be angle 1
x+ 75= 180
x =180-75
x= 105°
Answer:
1. is 105
2. 75 degrees
Step-by-step explanation:
Solve for x. Use the photo for the chord
Answer: x=3
Step-by-step explanation:
which is the correct input-output table for the function g(x)=-1/2(4x+6)
Answer: The third choice.
Step-by-step explanation: To find the first output, start with your first input. In this case, it's -2, so your equation would be g(-2)= -1/2(4(-2)+6). Start by solving inside the parenthesis. 4x-2=-8 and -8+6=-2. -1/2x-2= 1, so your first output should be 1. The only choice that has this is the third one, so that is your answer. Hope I could help :)
What are the measurements of FGT plssss?
Answer:
The Foster–Greer–Thorbecke indices are a family of poverty metrics. The most commonly used index from the family, FGT2, puts higher weight on the poverty of the poorest individuals, making it a combined measure of poverty and income inequality and a popular choice within development economics.
Step-by-step explanation:
0000000
Liam's baking plans changed. He
ended up baking 33 cookies. He
kept 5 for himself and split the
rest evenly between 7 friends.
H
What will the new equation be?
Answer:
(33 - 5)/7 = 4
Step-by-step explanation:
Mrs Fuller plants a 4 inch tomato plant in her garden. The tomato plant grows at a rate of 2 inches each week. Which equation can be used to determine h, the height of the tomato plant in inches after w weeks?
Answer: 4 + 2w
Step-by-step explanation:
The height of the tomato plant in inches after w weeks will be the value of the current height plus the weekly growth pee week. This can be represented in an equation as:
h = 4 + 2(w)
h = 4 + 2w
For example, the height of the tomato plant in inches after 5 weeks will be:
h = 4 + 2w
h = 4 + 2(5)
h = 4 + 10
h = 14 inches
What value of x makes the equation true?
3 - 14x = 17
A-1
B-1
C-28
D-2
Answer:
3 -14x =17
-14x = 17 - 3
-14x = 14
x = 14/-14 = 1/-1 = -1
∴ answer = -1
hope this answer helps you.....
please mark as brainliest... thank you!
Find the circumference of the circle.
A. 11 cm
B. 44 cm
C. 22 cm
D. 33 cm
Answer:
The answer is 44 cm .
which is (B)
Please help!! I need answering
Answer:
B
Step-by-step explanation:
26x82=2132
2132/2=1066
Solve the quadratic equation by using either numeric or graphic approach x^2 + 2x - 3 = 0
Answer:
d
Step-by-step explanation:
[tex]x 1= \frac{ - b + \sqrt{ {b}^{2} - 4ac} }{2a} \\ x2 = \frac{ - b - \sqrt{ {b}^{2} - 4ac} }{2a} \\ x1 = \frac{ - 2 + \sqrt{ {2}^{2} - 4\times 1 \times ( - 3)} }{2} = 1 \\ x2 = \frac{ - 2 - \sqrt{ {2}^{2} - 4 \times 1 \times ( - 3)} }{2} = - 3[/tex]
Answer:
d
Step-by-step explanation:
Solving by factorising
Given
x² + 2x - 3 = 0 ← in standard form
(x + 3)(x - 1) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 3 = 0 ⇒ x = - 3
x - 1 = 0 ⇒ x = 1
Plzzzz asappp help thanks
Answer:
I might not be right but try following the steps in the screen shot
Also the answer is in the screenshot
Step-by-step explanation:
I tried my best. :>
Please help me with this
Answer:
x = 5
Step-by-step explanation:
Given
- 3x - 2 = - 17 ( add 2 to both sides )
- 3x = - 15 ( divide both sides by - 3 )
x = 5
Solve -4x + 6(x + 2) = 20.
Answer:
4
Step-by-step explanation:
-4x +6x +12 = 20
2x + 12 = 20
2x = 8
x = 4
Answer:
X=4
Step-by-step explanation:
-4x+6x+12=29
2x=8
x=4
Good luck .