Solve the system using addition. Use pencil and paper. Explain why the addition method is a good choice for solving the system. If you wanted to solve for x first, is the addition method still a good choice? Explain.
x-2.5y=12.5
-x+2.3y=11.9
Answer: the answers are x = -292.5 and y = -122
Step-by-step explanation:
Elimination is combining equations to obtain an equation with just one variable. This is only possible if the coefficients of one variable in both equations are opposed and will cancel each other out when put together. Elimination is most effective when it occurs naturally in the equations, but equations may also be modified to produce typical coefficients by multiplying or dividing equations by a given value. The next step would be to utilize the equation we devised to determine the variable's worth and then insert that value back into the original equation to determine the remaining variable.
For solving the question to find x we have to make the coefficients of y the same. for that, we will multiply the first equation by 2.3 and the second equation by 2.5.
After that, we get the 2 equations as
2.3x-5.75y = 28.75
-2.5x+5.75y = 29.75
then by adding the 2 equations we get
-0.2x = 58.5
and by dividing 58.5 by -0.2 we get
x = -292.5
substituting the value of x in any equations above we get
y = -122
plese help me with question.
Answer:
c
Step-by-step explanation:
You can go ahead and emilminate a and d because there are no 4.6.Then you can emilminate b because the quartiles must be even and 4.7 and 6 are not even
please help with these two, or one I will give brainly for correct answer no bots or links
The first angle in a quadrilateral is 150 degrees. The second angle in the quadrilateral is 30 degrees.
The other two angles are congruent.
What are the angle measurements, in degrees, of angle 3 and angle 4?
Answer:
angle three is 30 degrees (depending on what kind of quadrilateral it is)
angle four is 150 degrees
Step-by-step explanation:
150+30
180 and if the other two are congruent meaning equal too
than they must also be 180 degrees in totale on the other side as well.
Rich is building a travel crate for his dog, Thomas, a beagle-mix who is about 28 inches long, 11 inches wide, and 24 inches tall.
For Thomas to travel safely, his crate needs to be a rectangular prism that is about 12 inches greater than his length and width, and 6 inches greater than his height.
What is the volume of the travel crate that Rich should build?'
Extra info: When you answer this question pls make sure its right and redo if needed im struggling in middle school so yeh
Answer:
27600
Step-by-step explanation:
28 long +12 -->40
11 wide +12 --->23
24 tall +6--->30
v=40×23×30=27600 cubic inches
HEEEEEELLLPPPP, I'LL MARK YOU THE BRAINLIEST IF YOU GET THE ANSWER RIGHT
A sequence of transformations was applied to an equilateral triangle in a coordinate plane.
The transformations used were rotations, reflections, and translations. Which statement about
the resulting figure is true?
A. It must be an equilateral triangle with the same side lengths as the original.
B. It must be an equilateral triangle, but the side lengths may differ from the original
triangle.
C. It may be a scalene triangle, and all the side lengths may differ from the original triangle.
D. It may be an obtuse triangle with at least one side the same length as the original triangle.
Answer:
A It must be an equilateral triangle with the same side lengths as the original triangle.
please help me im begging you :(( show ur work
Answer:
A
Step-by-step explanation:
first I put 3 in for all the a's then I just completed the equation.
Can anyone help with this?
Answer:
20.25
Step-by-step explanation:
If you add them in way then that’s the answer
help me please asap!!!!!!!!!14 points:)
Answer:
1. C
2. B
3. D
5. C
6. B
Hope this helped
Step-by-step explanation:
PLEASE ANSWER PWEASE
HELPP PLZ AND SHOW YOUR WORK
it costs 15 for one surfing lesson and 25 per day to rent a surf board write an expression for the total cost of one lesson and renting a surf board for y days
Answer:
15+25y= total cost
Step-by-step explanation:
this is easy
Answer:
25y + 15 = x
Step-by-step explanation:
I think this is the answer, it does not say that lessons are paid for every day.
△ PQR is rotated by 180° in a counterclockwise direction about the origin to obtain △ P′Q′R′. What are the coordinates of △ P′Q′R′?
Answer:
it is A
Step-by-step explanation:
Can someone tell me the answers please? thanks :D
Answer:
10. {5/8, 0.7, 0.755}
11. {-3.12, -3, 1 1/2}
12. {-2.98, -2 9/10, 2.88}
13. {4/5, 0.82, 5/6}
14. {-1 2/5, -1.20, -1.02}
15. {2 5/10, 2 3/5, 2.7}
10. {5/8, 0.7, 0.755}
11. {-3.12, -3, 1 1/2}
12. {-2.98, -2 9/10, 2.88}
13. {4/5, 0.82, 5/6}
14. {-1 2/5, -1.20, -1.02}
15. {2 5/10, 2 3/5, 2.7}
Answer:
Step-by-step explanation:
The radius of a circular musical drum is 70 centimeters.
Find its area.
Use 7 = - 3.14
Answer:
I got 219.8 as my answer, hope this helps!
A herd of dinosaurs made paintings in the sand with their claws.
Each baby dinosaur made 15 paintings and each adult dinosaur made 7 paintings. The entire herd made 208 paintings in total, and there were 3 times as many baby dinosaurs as adult dinosaurs.
How many baby dinosaurs and adult dinosaurs were there?
There were ____ baby dinosaurs and ____ adult dinosaurs.
Answer:
Baby dinosaurs-12
Adult dinosaurs-4
Explanation:
15b+7a=208 where b- baby , a is adult
b=3a
Putting the values
15.3a+7.a= 208
45a+7a =208
52a=208
a=4
b=3a= 12
PLEASE HELP ILL DO ANYTHINGG
Answer:
x is 23
Step-by-step explanation:
cause it is an 180 angle so 180-93=87
87 -18 =69
3x=69
x=23
Answer:
x=23Step-by-step explanation:
in order to find x
(3x+18)° + 93°=180°
⇒3x+18=180-93
⇒3x=180-93-18
x=69/3
x=23
and there we go X = 23
hope it helps :)
have a great day!!
(-2/3) -15.6 + (1/4 x -15.6)
negative two thirds times negative fifteen and six tenths plus one fourth times negative fifteen and six tenths. please help me.
Answer:
Video result for (-2/3) -15.6 + (1/4 x -15.6) negative two thirds times negative fifteen and six tenths plus one fourth times negative fifteen and six tenths. please help me.4:33
Multiplying positive and negative fractions (video)
Khan Academy · Khan Academy
Video result for (-2/3) -15.6 + (1/4 x -15.6) negative two thirds times negative fifteen and six tenths plus one fourth times negative fifteen and six tenths. please help me.4:11
Dividing negative fractions (video)
Khan Academy · Khan Academy
Video result for (-2/3) -15.6 + (1/4 x -15.6) negative two thirds times negative fifteen and six tenths plus one fourth times negative fifteen and six tenths. please help me.5:01
Subtracting fractions with unlike denominators (video)
Khan Academy · Khan Academy
Video result for (-2/3) -15.6 + (1/4 x -15.6) negative two thirds times negative fifteen and six tenths plus one fourth times negative fifteen and six tenths. please help me.6:22
Adding fractions with different signs (video)
Khan Academy · Khan Academy
Feedback
Step-by-step explanation:
Answer:
Step-by-step explanation:
[tex]\frac{-2}{3}-15.6+\frac{1}{4}x-15.6 = \frac{-2}{3}- 15.6 - 15.6 + \frac{1}{4}x\\\\ = \frac{-2}{3} - 31.2+\frac{1}{4}x\\\\= \frac{-2}{3}-\frac{31.2*3}{1*3}+\frac{1}{4}x\\\\= \frac{-2}{3}-\frac{93.6}{3}+\frac{1}{4}x\\\\= \frac{-95.6}{3}+\frac{1}{4}x[/tex]
20 points
To graph the point (4, -7) on the coordinate plane, start at the origin. Move 4 units _______ and 7 units ________ .
Answers
a
right.....down
b
left....down
If 5 lemons cost $1.95 and the price of each lemon is the same, how much does each lemon cost?
Answer:
$0.25
Step-by-step explanation:
The table shows a proportional relationship between the number of pounds of grapes
purchased and the total cost of the grapes.
A row of values is missing in the table.
Which number of pounds of grapes and total cost of the grapes could be used as the
missing values in the table?
Select each correct response.
Question 1 options:
Pounds of grapes: 2
Total cost: $1.38
Pounds of grapes: 3
Total cost: $2.53
Pounds of grapes: 6
Total cost: $3.68
Pounds of grapes: 8
Total cost: $5.52
Pounds of grapes: 11
Total cost: $8.97
Answer:
Pounds of grapes: 11
Total cost: $8.97
Step-by-step explanation:
Because when you look at the prices, the last answer (Pounds of grapes: 11
Total cost: $8.97)is the most correct because it is adding by 2 (2, 4, 6, 8) every time. Its not exactly 8 but its the closet number :)
Please help me ASAP. NO LINKS PLEASE. 8TH GRADE
The last question!
John plans to practice piano at least 2 1/2 hours this weekend.
If he practices 1 1/ 6 hours on Saturday and 1 1/4 hours on Sunday, will he meet his goal?
please help mee on this question
Answer:
52 yards squared
Step-by-step explanation:
Split the two shapes into two rectangles. Area of first one is 3*4=12 yRDS SQUARED. second area is 10*4=40 yards squared. 40+12=52 yards sqared
3. Write the following as an algebraic expression: Twice the cube of z .4. Write the following as an algebraic expression: The quotient of the sum of x plus 4 and 2
Answer:
im pretty sure its Z^3 & x+4/2
Step-by-step explanation:
2s+10-7s-8+3s-7
syplifying expression fyi
Answer:
-1+5z, -25+20y, 4d+14, 2n-2, 40k+8, 8b+5, -9+22p
Step-by-step explanation:
1) -4+7z+3-2z
-1+5z
2) 15+4(5y-10)
15+20y-40
-25+20y
3) 2d+17-3-2d+4d
4d+14
4) 12n-8-2n+10-4
2n-2
5) 8(2k+1+3k)
16k+8+24k
40k+8
5) 4(2b+2)-3
8b+8-3
8b+5
6) -4+8p-6p-5+20p
-9+22p
Brainliest if you can answer question 12 right :)
Hey im starting and i have a few rough ones/8ft.=_in. Thanks!
Please help!!! ill mark brainliest!!
Answer:
where is the question
Step-by-step explanation: