Which of these strategies would eliminate a variable in system of equations?
2x+3y=-5
2x-3y=10
A.add the equations.
B.subtract the bottom equation from the bottom equation.
C.multiply the top equation by 2,then add the equations.
Answers
Answer: (b) Multiply the top equation by 3, multiply the bottom equation by 2, then add the equations.
Step-by-step explanation: the strat would eliminate a variable in this system
Related Questions
The scale on a map of Oregon is 1 inch = 5000 feet What is the scale factor?
Answers
Answer:
C
Step-by-step explanation:
Answer:
Step-by-step explanation: It would be A because the factor is the denominator and it would be more units in size, so there are 60,000 inches in 5,000 feet.
What is two plus seven
Answers
Answer:
9
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
2 + 7 = 9
I need help solving the value for x and y
Answers
Answer:
Step-by-step explanation:
y=10
is your answer
2. A plastic smartphone case is roughly rectangular and measures 6 in. by 3 in. The back side of
the case has two sections cut out: a l in. by 0.5 in. rectangle for the camera and a triangle that
is 1.5 in. wide and 1.5 in. tall so that the brand logo on the phone is visible when it is in the
case. What is the approximate area of the plastic on the phone?
15.25 in.2
0 16.375 in.2
019.625 in 2
20.75 in 2
Answers
Answer:
ITs 16.375 in.2
Step-by-step explanation:
If your in connections and you have Lesson 4: Area of Other Figures
Math 7 B Unit 3: Measurement the whole quick check answers are
1. D. 40.5cm2
2. B. 16.375 in.2
3. B 540cm2
4. C 460
Your welcome also I swear these are right!
this is the question i need help with.
Answers
Given:
[tex]\overline{AE}\cong \overline{DE}, \overline{AB}\cong \overline{DC}[/tex]
To prove:
[tex]\Delta ABE\cong \Delta DCE[/tex]
Solution:
In triangle AED,
[tex]\overline{AE}\cong \overline{DE}[/tex]
Two sides of triangle AED are equal, it means triangle AED is an isosceles triangle. The base angles of an isosceles triangle are equal. So,
[tex]\angle A\cong \angle D[/tex]
In triangle ABE and triangle DCE,
[tex]\overline{AE}\cong \overline{DE}[/tex] (Given)
[tex]\angle A\cong \angle D[/tex] (Base angles of an isosceles triangle are equal)
[tex]\overline{AB}\cong \overline{DC}[/tex] (Given)
Two corresponding sides and their included angles are congruent. So, triangles are congruent by SAS postulate of congruence.
[tex]\Delta ABE\cong \Delta DCE[/tex] (By SAS postulate of congruence)
Hence proved.
Marcus bought a booklet of tickets to use at the amusement park. He used 50% of the tickets on rides, 1/10 of the tickets on video games, and the rest of the tickets in the batting cage. Marcus says he used 38% of the tickets in the batting cage. Do you agree? Complete the explanation.
Answers
Answer:
no
If he used 50% on ticket for rides, the remaining tickets he would have is (100% - 50%) 50%.
He used 1/10 on video games. Converting 1/10 to percentage gives 10%.
The total percentage of tickets used is 60%. He should have 40% to spend on batting cages
Step-by-step explanation:
Sally has 42 cookies she wants to eat some and share some with her class if she hopes to share at least 35 with them with her class how many cookies can she eat?
Answers
Answer:
7 cookies
Step-by-step explanation:
42 - 35 = 7
Brian has saved five dollars in dimes quarters and half dollars she finds that she has 30 coins all together and there are four times as many quarters as there are half dollars how many dimes does Brian have
Answers
9514 1404 393
Answer:
20 dimes8 quarters2 half-dollarsStep-by-step explanation:
Let d, q, h represent the numbers of dimes, quarters, and halves Brian has. We can write 3 equations in these 3 variables:
10d +25q +50h = 500 . . . . value of the coins, in cents
d + q + h = 30 . . . . . . . . . . . total number of coins
4h = q . . . . . . . . . . . . . . . . . four times as many quarters as halves
Using the last equation to substitute into the other two, we get ...
10d + 150h = 500
d +5h = 30
The second equation can be written as ...
5h = 30 -d
and the first can be written to facilitate substitution:
10d +30(5h) = 500
10d +30(30-d) = 500 . . . . . substitute for 5h
900 -20d = 500 . . . . . . . . . simplify
400 = 20d . . . . . . . . . . . . . add 20d-500 to both sides
d = 20 . . . . . . . . . . . . . . . . divide by 20
Brian has 20 dimes.
Melissa has her own catering service. So far this year her company has generated income of $45,750. If she charges an average of $350 for each catering job, which linear equation could be used to find the company's total (t) income after completeing jobs?
Answers
Answer:
t = 350x + 45,750
Step-by-step explanation:
The linear equation that would represent this scenario perfectly would be the following
t = 350x + 45,750
In this equation, the variable x represents the total number of catering jobs that Melissa and her company are completing. This variable gets multiplied by the cost that she charges for each individual job. Finally, the total amount of money that she has already made so far this year is added to that product to give us the total income that she would make for the year after completing the jobs.
please help me please
Answers
Answer:
Answer is a.multiplication.
Step-by-step explanation:
I hope it's helpful!
What is the answer to this question
Answers
Answer:
C
Step-by-step explanation:
Quite simple. If x=4, the x+8, or 4+8= 12. 3x or 3*4 also happens to equal 12. Yw.
Answer:
c
Step-by-step explanation:
x + 8= 3x
if the answer is 4 then it would be 4 + 8 = 12 which makes sense. if you have a problem like this just put in what your trying to find and when the problem makes sense that's the solution.
Dan invests £800 into his bank account.
He receives 5% per year simple interest.
How much will Dan have after 3 years?
Give your answer to the nearest penny where appropriate.
Answers
Answer:
p=£800
r=5%
t=3years
Step-by-step explanation:
simple interest=ptr/100=£800×5×3/100=£120
Answer:
sorry dont know answer :C
Step-by-step explanation:
What is the answer to this question
Answers
Answer:
12.5 cubic units
Step-by-step explanation:
The volume formula is l*w*h=v
The length is 2.5, the width is 2.5, and the height is 2.
Multiply these together to get our answer!
A snowboard was $180 but marked as 30% off. There is a state tax of 7.5%. How much would you pay for the snowboard
Answers
Answer:
180(.30)=54, 180-54=126, 126(0.075)=9.45+126=135.45
Step-by-step explanation:
The total is $135.45.
Answer:$135.45
Step-by-step explanation:
180X .30 = 54 dollars off
180-54 =126 so the board on sales costs $126
Adding the tax
126x.075 = 9.45 is the tax due
126+9.45 = 135.45
what is the sum of angles in a triangle
Answers
Answer:
The sum of the three angles of any triangle is equal to 180 degrees.
Step-by-step explanation:
Answer: The sum of angles in a triangle is 180 degrees
16 cm 44.2 cm in percent
PLSS HELP!!
Answers
Which equation has infinitely many solutions?
Answers
Answer:
C
Step-by-step explanation:
9x+4.5-2x=2.3+7x+2.2
9x-2x+4.5=2.3+7x+2.2
7x+4.5-4.5=7x+4.5-4.5
7x=7x
7x-7x=7x-7x
0=0
Jason unfolded a cardboard box. The figure of the unfolded box is shown below: A long rectangle divided along the length into 4 equal squares is shown. Along the upper edge length of the second square is shown another square, and along the lower edge length of the fourth square is shown another square. The first square from the left has two adjacent sides labeled as 10 inches each. Which calculation will give the total surface area of the cardboard, in square inches, that was used to make the box? (1 point) a 5 × 6 × 6 b 6 × 5 × 5 c 10 × 6 × 6 d 6 × 10 × 10
Answers
Answer:
The answer is the third one
Step-by-step explanation:
Hope I helped
in the triangle sin A =
Answers
Answer:
uhhh i forgot but its one of the bopttom 2
Step-by-step explanation:
A vehicle travels 180 miles in 4 hours. At this rate, how many miles will the vehicle travel in 6 hours?
Answers
Answer:
270 miles
Step-by-step explanation:
Divide 180/4 = 45
45 * 2 = 90
180 + 90 = 270
A vehicle can travel 180 miles in 4 hours, then in 6 hours, the vehicle will travel 270 miles.
What is an arithmetic operation?The four fundamental operations of arithmetic are addition, subtracting, multiplying, and dividing two or more numbers. Included in them is the study of integers, especially the order of operations, which is important for all other aspects of mathematics, notably algebra, information management, and geometry.
As per the data given in the question,
Distance travelled by the vehicle = 180 miles
Time is taken to travel 180 miles = 4 hours
Distance travelled in 1 hour = 180/4 = 45 miles
Then,
Distance travelled in 6 hours = 6 × 45 = 270 miles.
To know more about arithmetic operations:
https://brainly.com/question/13585407
#SPJ2
This is due like now!!!! Please help!!!
Look at the graph:
What is the slope?
Simplify your answer and write it as a proper fraction, improper fraction, or integer.
Answers
A pair of designer sneakers was purchased for $150. Since they were purchased, their price has increased by 15%. What is the new price?
Answers
Answer:
$172.50
Step-by-step explanation:
150 increase 15% =
150 × (1 + 15%) = 150 × (1 + 0.15) = 172.5
Answer:
$172.50
Step-by-step explanation:
You have to multiply 150 by 1.15 because that is 150 plus 15% of itself.
64r to the 1/6th power
Answers
who can answer my graphing questions for me need help
Answers
Answer:
maybe i...............
Dexter makes 20 cookies. He eats 6 of the cookies and takes the rest to school.
What fraction of the cookies does he take to school? Give your answer in its simplest form.
Answers
but in its simplest form it’s 7 over 10 :)
After 7 days, people saw the video.
Answers
Answer:
137,257
Step-by-step explanation:
Answer:
137,527
Step-by-step explanation:
In the given right triangle, AX is the altitude. If CX-9 and AX - 9, what is the length of BC? "Note: Figure not drawn to scale"
A)
9
B)
10
9
18
D)
27
Answers
Answer:
Step-by-step explanation:
I’m pretty sure the answer is C
Answer: C) 18
Step-by-step explanation: If you don’t believe me, please select the image below for proof.
True or False: The points (6,13) (21, 33) and (99, 137) all lie on the same line. The equation of the line is y = 4/3x + 5. PLS HELP ASAP
Answers
Answer:
This is true look at picture for clarification
Answer:
True
Step-by-step explanation:
To see if the points all lie on the line y = 4/3x + 5, substitute their x and y values into the equation, solve, and see if the equation is true.
1) First, substitute the x and y values of (6,13) for the x and y in the equation and solve:
[tex]13 = \frac{4}{3} (6) + 5 \\13 = \frac{24}{3} +\frac{15}{3} \\13 = \frac{39}{3}\\13 = 13[/tex]
The result is a true equation. Thus, (6,13) is on the line.
2) Do the same with the point (21,33):
[tex]33 = \frac{4}{3} (21) + 5 \\33 = \frac{84}{3} +\frac{15}{3} \\33 = \frac{99}{3} \\33 = 33[/tex]
The result is a true equation. Thus, (21,33) is on the line.
3) Finally, do the same with (99, 137):
[tex]137 = \frac{4}{3} (99) + 5\\137 = \frac{396}{3}+\frac{15}{3} \\137 = \frac{411}{3} \\137 = 137[/tex]
The result is a true equation. Thus, (99, 137).
All three points are on the line, thus the statement is true.
Given: If a child is at least 4 feet tall, then
he or she can ride the roller coaster. If a
child can reach the red bar, then the child
is at least 4 feet tall.
Which conjecture is valid by the Law of
Syllogism?
F if a child can reach the red bar, then
the child can ride the roller coaster,
G If a child is at least 4 feet tall, then
the child can reach the red bar.
H If a child can ride the roller coaster,
then the child is at least 4 feet tall.
J If a child can ride the roller coaster,
then the child can reach the red bar.
O
Answers
Answer:
F
Step-by-step explanation:
HELP I NEED HELP ASAP
Answers
Answer:
Your answer will be B.
Step-by-step explanation:
Your answer will be g=t+5. All you have to do is graph a line using the slope and the y-intercept, or just simply two points, to help you out finding it yourself the slope is 1 and the y-intercept is (0,5). I hope this helps you out. : )