Answer:
x = 5, y = -1
Step-by-step explanation:
2x+3y=7
4x-5y=25
Keep the second equation the same, but change the first equation so you have something to substitute into.
3y= -2x+7
y= -2/3x + 7/3
substitute into second equ.
4x + 10/3x - 35/3 = 25
put the variables on one side, and the numbers on the other.
22/3x = 110/3
divide by 3
22x = 110
x = 5
Substitute x = 5 into the first equation,
10 + 3y = 7
move numbers to one side, and variables to the other.
3y = -3
y = -1
Answer:
x = 5, y = - 1
Step-by-step explanation:
2x + 3y = 7
4x - 5y = 25
In the second equation, solve for y in terms of x:
4x - 5y = 25
- 5y = 25 - 4x
- y = 5 - 4x/5
y = - 5 + 4x/5 Now substitute this for y in equation 2x + 3y = 7
2x + 3(-5 + 4x/5) = 7
2x - 15 + 12x/5 = 7
10x/5 - 15 + 12x/5 = 7
22x/5 = 7 + 15
22x/5 = 22 Now multiply both sides by 5/22 to isolate :
x = 5
Now substitute this value (x = 5) into 4x - 5y = 25 to solve for y:
4(5) - 5y = 25
20 - 5y = 25
- 5y = 5
y = - 1
You can check that these are correct by substituting x = 5 and y = -1 into the above equations to make sure they check out.
Which congruence theorems can be used to prove AABR = AACR? Select three options.
A. HL
B. AS
C. SSS
D. ASA
E. AAS
Answer:
HL, SAS, ans SSS
Step-by-step explanation:
ASA and AAS cannot be used because we can only confirm one angle of each triangle.
Congruent shapes have equal corresponding sides and angles.
The congruence theorems that can be used to prove [tex]\triangle ABR \cong \triangle ACR[/tex] are HL, SAS, and SSS
[tex]\triangle ABR \cong \triangle ACR[/tex] means that, the triangles are congruent.
From the attached figure, we have the following congruent sides and angle:
AB and AC --- SideBR and CR --- SideAR and AR --- Side (Hypotenuse Leg)Angle C and Angle B --- angleThe above highlights mean that the following theorems can be used to prove that the triangles are congruent:
HL, SAS, and SSS
Read more about congruent triangles at:
https://brainly.com/question/11329400
Which of the following tables represents a proportional relationship?
Answer:
C
Step-by-step explanation:
A is incorrect because as x goes from 0 to 1, y jumped from 0 to 4
B is incorrect because as x goes up by 2, y at first goes up by 2 but then jumped to 4.
C is correct because as x goes up by 1, y goes up by 3
D is incorrect because y jumped from 0 to 10 and first but lowered to 5 after.
Please help :( im struggling
Answer:
a= 9/4
Step-by-step explanation:
2m^(5/2)/m^(1/4)
2m^(5/2 -1/4)
2m^(9/4)
Hope you find this helpful <3
What is the y-intercept of y = -3x
Answer:
0
Step-by-step explanation:
The y-intercept of y = -3x is zero.
Answer:
0
General Formulas and Concepts:
Algebra I
Slope-Intercept Form: y = mx + b
m - slope b - y-interceptStep-by-step explanation:
Step 1: Define
y = -3x
Step 2: Break Function
Identify Parts
Slope m = -3
y-intercept b = 0
*We assume that if the variable isn't there, it is 0 or being multiplied by 0.
9 x 2 = 2 x 9
A. Associative property of x
B. Distributive property
C. X inverse property
D. Commutative property of X
Answer:
D
Step-by-step explanation:
communicative property of X
f(x) = (1)
What is the x intercept
Answer:
There is no x-intercept, only a y-intercept, which would be 1
3 less than 8 times w
Answer:
8w-3
Step-by-step explanation:
Is that what you were looking for?
Translate the given phrase to an expression.
The quotient of 15 and 2
The expression is (Do not simplify)
Answer:
15/2=7 R1
Step-by-step explanation:
Which expression below does not give the area of this figure?
a
b
c(a+b)
(a+b)c
ab + ac
ac + bc
Answer:
Step-by-step explanation:
Ab + ac
f f(x)=4x^(2)-9, find f(-1)
f(-1)= ?
Answer:
[tex]f(-1)=-5[/tex]
Step-by-step explanation:
Numeric Value of a Function
Given:
[tex]f(x)=4x^2-9[/tex]
It's required to find f(-1).
It can be calculated by substituting the value x=-1 in the function:
[tex]f(-1)=4(-1)^2-9[/tex]
Calculating:
[tex]f(-1)=4*1-9[/tex]
[tex]f(-1)=4-9[/tex]
[tex]\boxed{f(-1)=-5}[/tex]
A square with a perimeter of 20 units is graphed on a coordinate grid. The square is dilated by a scale factor of 0.4 with the origin as the center of dilation. If (x , y ) represents the location of any point on the original square, which ordered pair represents the coordinates of the corresponding point on the resulting square
Answer:
its 20x20
Step-by-step explanation:
ty for point also i did the test
Answer: I just did the test so the answer would be (20x,20y)
Step-by-step explanation: hoped this help thx for the points :D
take like 10 secs. im just not smart
Answer:
A
Step-by-step explanation:
Answer:
B.
hope it helps...........
trayvon bought 2 gallons of milk at the supermarket how many quarts of milk did he buy
Answer: He bought 8 quarts
Step-by-step explanation:
There are 4 quarts in a gallon so if you multiply 4 by 2 then you get 8,
Answer:
8 quarts
Step-by-step explanation:
1 gallon is equal to 4 quarts, so from there you just multiply 2 times 4 and you get 8 !
I need some help with geometry?
Help please!!!!!! :(
Answer:
2). 2
3). 5
4). 3
5). 6
Step-by-step explanation:
What is (6,2) rotation 270
Given:
The point is (6,2).
To find:
The image of given point after rotation of 270 degrees.
Solution:
Let the given point be P(6,2).
Rotation of 270 degrees means the figure is rotated 270 degrees counterclockwise about the origin. So, the rule of rotation is
[tex](x,y)\to (y,-x)[/tex]
Using this rule, we get
[tex]P(6,2)\to P'(2,-6)[/tex]
Therefore, the image of given point is (2,-6).
HELPPP PLEASEEEE!!!!
Answer: $6.04
Step-by-step explanation:
add 65.25 and 86.50 you get 151.75 then do 157.79-151.75 and you get 6.04
How many groups of 13 inch are in 34 inch?
Answer:
2 groups
Step-by-step explanation:
13 times 3 is 39
39 is not 34
please mark me brainliest!!!
The price of a technology stock was $9.70 yesterday. Today, the price fell to $9.59 Find the percentage decrease. Round your answer to the nearest tenth of a percent.
Answer:
round it to 20×10 there's you answer
For a school picnic, leslie ordered a box of fresh-baked gingerbread cookies and sugar cookies. She got 60 cookies in all. 15 of the cookies were gingerbread. What percentage of the cookies were gingerbread.
Answer:
Pretty sure 25%.
Step-by-step explanation:
First, you would need to see how many times 60 goes into 100, because a percent is ALWAYS over 100. You should get an answer of 1.66666667. Then you if you multiply it to one of the numbers then you have to do it to the other number. So, you would do 15 times 1.66666667. You would get 25. So, that would be 25 over 100 or 25/100. And 25 over 100 is 25%.
I hope I helped! :) Sorry if it's wrong :(
Can someone substitute this? Please and thank you
Step-by-step explanation:
soln
given
y=2x+3 -----(i)
y=-x-9 ------(ii)
now, putting value of equation (i) in (ii)
y= -x-9
or, 2x+3 = -x-9
or, 2x+x = 9-3
or, 3x = 6
or, x = 6/3
or, x = 2
again,
y = 2x+3
or, y = 2×2+3
or, y = 7
therefore, value of X and Y are 2 and 7 respectively.
Please Help Fast It’s Pretty Easy a sew both question please and thank you
Answer:
5x-10=60 being vertically plopposite angle .
Answer:
14; vertical
Step-by-step explanation:
since these are vertical angles, they will equal the same;
5x - 10 = 60
add 10
5x = 70
divide by 5
x = 14
I got some money for my birthday. I save and spend in the ratio 2:3. I save £32. How much money did I receive for my birthday?
Answer:
80 i think
Step-by-step explanation:
32.3=80
Step-by-step explanation:
Amount of money saved : spent = 2 : 3.
Since amount of money saved = £32,
Amount of money spent = £32 * (3/2) = £48.
Total amount of money = £32 + £48 = £80.
Therefore I received £80 for my birthday.
Which table does NOT show a proportional relationship?
1 point
A
B
C
D
2.
.
X + 3
X + 18
X +4
X=
x = -1,-16,-2.
TIE FIGHTERS GO ZOOOOOOOM
2% of 65 answer fast please
Answer:
2% of 65
2/100*65
13/10
1 3/10
Help!!!!!! Please and thanks
Answer:
HI I am back thanks for zooming in I would say your answer would be D sorry if i am wrong but that should be correct I am 98% sure. Plz let me know if it is correct or not! (Brainliest Plz)
Step-by-step explanation:
(PLz give me Brainliest)
3-7/8
please answer :p
Answer:
2.125 is your answer!! pls give brainlist (:
Step-by-step explanation:
how many solutions does the equation 2 + 6 (x - 4) = 3x have?
Answer:
1 solution
Step-by-step explanation:
To find this out you can just solve the equation so if you simplify you get
2+6x-24=3x
-3x=-22
x=22/3
so one solution
Write down the value of the 4 in 8642 in figures