Answer:
x = 7
y = 11
Step-by-step explanation:
Given the system;
y = 2x - 3
x + y = 18
1. Approach
The easiest way to solve this system of equations is to solve the second equation for the variable (y). Then add the systems, use algebra to solve for the value of (x), then substitute that value back into one of the original equations to solve for the value of (y). Another name for the method in use is the method of elimination, this is when a [erspm manipulates one of the equations in a system of the equation such that when they add the equations, one of the variables eliminatates. Thus, they can solve for the other variable and the backsolve for the value of the unknown variable.
2. Solve one of the equations for a variable
Manipulate the system such that each equation is solved for the same variable,
x + y = 18
Inverse operations,
x + y = 18
-18 -18
x + y - 18 = 0
-y -y
x - 18 = -y
3. Use elimination
Now substitute this back into the original system,
y = 2x - 3
-y = x - 18
Add the systems,
y = 2x - 3
-y = x - 18
_________
0 = 3x - 21
Inverse operations,
0 = 3x - 21
+21 +21
21 = 3x
/3 /3
7 = x
4. Find the value of the unknown variable
Backsovle to find the value of (y),
x + y = 18
Substitute,
7 + y = 18
Inverse operations,
7 + y = 18
-7 -7
y = 11
Answer:
X=3 Y=15
Step-by-step explanation: First you need to use the problem 18/2=x to find the value of x. Now to find the value of y, you need to subtract 3 from 18. Then you solve
15=2(9)-3 15+3=18
Can u pls help me?? I need so much help on this and im so sorry for posting a lot
Answer:
B
Step-by-step explanation:
Congruent means same shape and same size. So congruent has to do with comparing two figures, and equivalent means two expressions are equal. So to say two line segments are congruent relates to the measures of the two lines are equal.
Since you already had angle N and O, B would be correct because they have the same shape and size.
Suppose that a sequence is defined as follows. And find the next 4 terms.
a1= -1
an=-4an-1 +2
n>= 2
Answer: s,djfhbewhbwejkhbkhbwqigqiygwurygqwygRwqyr
Step-by-step explanation:
lol ok so im stuck on this pls help
Answer:
The slope is -5
y intercept is -2
Step-by-step explanation:
Solve the equation for y
5x+y =-2
Subtract 5x from each side
5x+y -5x = -5x-2
y = -5x-2
This is in slope intercept form
y = mx+b where m is the slope and b is the y intercept
The slope is -5 and the y intercept is -2
Answer:
Slope -5
y intercept 2
Step-by-step explanation:
5x+y=-2 in the form y =Mx+ c is,.
y=-5x+-2
y=-5x-2
Where m is the slope which is -5
And c is the y intercept i.e 2
question is in the picture please explain how you got ur answer!
Answer:
1/6
Step-by-step explanation:
Because there are 3 even numbers on a number cube, and if you roll it twice then it would be 6. And there is only one "3" on a number cube. So, the answer is 1/6.
Select all the quantities that describe a unit rate.
Mark bought 1 pound of grapes.
A recipe calls for 3 cups of flour for 1 cake.
Emma drank 2 cups of coffee per day.
Madison had 4 books and 3 notebooks in her backpack.
Daniel makes $340 each month at his summer job.
Answer:
2, 3, 5
Step-by-step explanation:
2: 3 cups of flour per cake
3: 2 cups of coffee per day
5: $340 per month
HELP pls if right get brainlist
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Answer:
x = 115
Step-by-step explanation:
(straight angle) - (acute angle) = (x or obtuse angle)
180 - 65 = 115
PLS HELP ME!!
describe an example of a situation when the graph would be represented with a constant interval.
Write the equation of the line in slope-intercept using y=mx+b
Mike walked 5/8 of the way to school before it started raining. How many percent of the trip did he get before it rained?
Answer:
62.5%
Step-by-step explanation:
Answer:
62.5%
Step-by-step explanation:
you don't have to solve both but, if you don't attempt to solve it i'm going report yo account
Answer:
6. 13
7. approx 15.81
Step-by-step explanation:
H e e e e l l l ppppp
Answer: C
Step-by-step explanation:
The table in the image shows the results of a survey of 100 people randomly selected at an
airport. Find the experimental probability that is going to City E. Write the probability as a
fraction, decimal and percent.
Answer:
8/100, 0.08, and 8%Step-by-step explanation:
probability = no. of responses/total no. of people.= 8/100
In fraction, 8/100
In decimal, 0.08
And in percent, 8%
On a coordinate plane, what is the distance between points D and H? When the H coordinate is (9 , 8) and the D coordinate is (1 , 3) Round to the nearest tenth of a unit.
Which is the correct answer?
- 3.7 units -7.3 units
- 5.2 units -9.4 units
Hello!
I need help please...
What is [tex]\sqrt[450]{3,650}[/tex] as a divided.
Make a explanation to this... Do not copy, or go on g.oogle to get the answer to this...
And maybe you can show proof how you got the answer?
Thanks~
Answer: The Answer is in a fraction form
Step-by-step explanation:
9/73
someone help me please
What number does x represent in the equation below?
3x + 7 = 34
Triangle ABC is shown Translate Triangle ABC 5 units left and 4 units up and reflect it over the x-axis
Here is my process for solving this.
First I drew arrows that indicated I was moving the whole triangle 5 units to the left.
*Look at first attachment*
Then I drew another triangle using those new points. (The new triangle is in pink)
*Look at second attachment*
Then I drew arrows that moved this new triangle 4 units up. (The new arrows are in pink)
*Look at third attachment*
Then I drew the new triangle in blue using the new points.
*Look at fourth attachment*
Then I mirrored / reflected the triangle over the x axis (the horizontal line) In green.
*Look at fifth attachment*
The fifth attachment in green is the final product! Hope that helps.
A ramp was constructed to load a truck. If the ramp is 9 feet long and the horizontal
distance from the bottom of the ramp to the truck is 7 feet, what is the height from the
ground to the top of the ramp? (Round your answer to the nearest tenth of a foot)
Answer:
a^2 + 64 = 100
a^2 = 36
a = 6
por lo que la altura es de 6 pies
Step-by-step explanation:
Find the area of the given parallelogram.
A.128 sq in
B.264 sq in
C.276 sq in
D.272 sq in
Answer:
272
Step-by-step explanation:
because you multiply 17 x16
Step-by-step explanation:
✰[tex] \underline{ \underline{ \large{ \tt{ \bold{ \purple{G \: I \: V \: E \: N}}}}} }: [/tex]
Base of the parallelogram ( b ) = 16 inHeight of the parallelogram ( h ) = 17 in✰ [tex] \underline{ \underline{ \large{ \tt{ \bold{ \red{T \: O \: \: F \: I \: N \: D }}}}}}:[/tex]
Area of the given parallelogram ( P )✰ [tex] \underline{ \underline{ \large{ \bold{ \pink{ \tt{ S \: O \: L \: U \: T\: I \: O\:N}}}}}} : [/tex]
[tex] \boxed{ \large{ \bold{{\sf{Area \: of \: a \: parallelogram \: ( \: A \: ) \: = b \: \times \: h}}}}}[/tex]
Plug the known values and then multiply !
⟷ [tex] \large{ \tt{17 \: in \: \times \: 12 \: in}}[/tex]
⟷ [tex] \large{ \tt{ 272 \: {in}^{2} }}[/tex]
☥ [tex] \red{ \boxed{ \boxed{ \bold{ \tt{Our \: final \: answer : \underline{ \boxed{ \tt{272 \: {in}^{2} }}}}}}}}[/tex]
Hope I helped ! ♡
Have a wonderful day / night ! ツ
# [tex] \underbrace{ \mathfrak{ \: Carry \: On \: Learning}}[/tex] !!
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
5. What are 3 true statements you can claim based on
the proportional relationship between the time (hrs)
driving & the distance (mi) driving. (find 3 points
yourself)
Answer: 1 hour is equal to 46 miles 2 hours is 92 miles and 20 hours is 920 miles
Step-by-step explanation:
92/2 = 46 miles
46 x 2 = 92 miles
46 x 20 = 920
Brandi has equal numbers of hip-hop songs and country songs loaded on her personal music player. She has it set to play songs on a random shuffle. Suppose Brandl is designing a simulation that could be used to estimate the probability that the next three songs to play are all hip-hop songs Which simulation design could Brandi use to estimate the probability?
A. Coin Let heads (H) = hip-hop Let tails (T) = country Toss coin three times. Repeat
B. Random digits Let 0.1phop Let 2.3.4.5.6 = country Select two random digits Repeat
C. Number cube Let 1 = hip-hop Let 2 = country Roll cube three times Repeat
D. Nurbe cube let 1 = hip-hop let 2 = country Roll cube four times. Report
How does finding the unit rate make it easier to solve problems?
Answer:
Unit rate is regularly a helpful method for contrasting proportions and their related rates when estimated in various units. The unit rate permits us to look at different sizes of amounts by inspecting the quantity of units of one amount for each one unit of the subsequent amount.
Step-by-step explanation:
find the volume of an icecream cone that has an hight of 4.6 in. and a diameter of 1.2 in.
Answer:
The volume would be 1.73 inches cubed.
Step-by-step explanation:
Use the formula for finding the volume of a cone, and plug in the given numbers.
V=πr^2*h/3
V=3.14*.6^2*4.6/3
Simplify the equation, and you are left with..
V = 1.73
I WILL MARK BRAINLIEST!!
From Monday through Friday, Earl works in the bookstore on 2 days and in the tutoring center on another . On Saturday and Sunday, Earl writes news stories 50% of the days. How many days does Earl work in a week? What percent of Monday through Friday does Earl work?
Answer:
4 days a week
Step-by-step explanation:
2+1=3
3+1/2+12=4
What is the slope of the line that passes through the points listed in the table?
A. -3
B. 3
C. 5
D. 7
Answer:
C
Step-by-step explanation:
took the test
A cheese spreader can be broken into a rectangle and triangle. The rectangle has a height of 3 centimeters and a base of 5 centimeters. The triangle has a height of 3 centimeters and a base of 3 centimeters.
What shapes can the shape of the spreader be divided into to find its area?
A. a triangle with a height of 3 cm and a base of 8 cm and another triangle with a height of 5 cm and a base of 8 cm
B. a triangle with a height of 3 cm and a base of 3 cm and a rectangle with a height of 3 cm and a base of 8 cm
C. a triangle with a height of 3 cm and a base of 8 cm and another triangle with a height of 3 cm and a base of 8 cm
D. a triangle with a height of 3 cm and a base of 3 cm and a rectangle with a height of 3 cm and a base of 5 cm
Answer:
D
Step-by-step explanation:
Safeway is selling a 15 oz. box of Cinnamon Toast Crunch for $3.75. Weis is selling a 20 oz. box of Cinnamon Toast Crunch for $4.00. If you want the best deal (cheapest price per ounce), where should you purchase your cereal? Why?
Answer:
You should purchase the cereal at Weis
Step-by-step explanation:
the first options gives a rate of 25 cents per oz. the option that Weis offers is a rate of (0.1875round that up to 19) 19 cents per oz.
( please help!! I will give brainliest tysm! ) The diameter of a carbon atom is 2.2 × 10 -8cm. Write this as a whole number
Answer:
it is 0.000000022 cm as a number but rounded to 0 as a whole number
Answer:
The answer is -220000000.
Step-by-step explanation:
First multiply 10 X-10 X-10 X-10 X-10 X-10 X-10 X-10 and you will get -100000000 then multiply 2.2.
28. Question 28 has 2 parts A&B
Anita walked 1/8 of a mile in 1/10 of an hour Part
A: At this rate, how far would Anita walk in an hour?
B At this rate, how long would it take Anita to walk 5 miles?
Step-by-step explanation:
1)3.8miles
2)15 miles
.................
Please help my with this question!!! I’ll give brainlist for the correct answer
Answer:
I think its C
Step-by-step explanation:
Answer:
The answer is c
Step-by-step explanation: