Solve the simultaneous equations
8x+3y=45
2x+3y=27
Your final line must say x= and y=
Answers
Step-by-step explanation:
here's your answer
hope it helps you
Answer:
x=3 y=7
Step-by-step explanation:
8x+3y=45....(1)
2x+3y=27......(2)
subtract eq(2) from (1)
8x+3y=45......(1)
-2x-3y= -27......(2)
we get 6x=18
x=3
put the value of x in equation (1)
8×3+3y=45
24+3y=45
3y=21
y=7
Related Questions
Please help me. PLEASE
Answers
Answer:
Part A: (3, 2)
Part B: 5
Step-by-step explanation:
Point B of the parallelogram is the top right dot on the graph. In order to find its coordinate, we simply trace the dot's trajectory back to the x and y axis accordingly. If we look under the dot we see that its x-axis is 3 and if we look to the left of the dot we see that its y-axis is 2. Therefore, the coordinate of the fourth vertex B is (3, 2)
To calculate the length of side AB we simply count the number of squares between them, which looking at the graph we can see is 5 squares. Therefore the length of AB is 5
Please help me out with this please and thank you
No links no stealing points
Answers
Answer:
A
5/2 for line 1
5/2 for line 2
5/2 for line 3
B they are all parallel because the have equal slope
Step-by-step explanation:
explanation is in the image
that's all...have fun
please help this is so confusing.
Answers
Answer:
6 ÷ 3 = -6/-3
(-3)/6 = 3 ÷ (-6) = -(3/6)
6/(-3) = -(6/3)
leftover: -3/-6
The approximated difference of 10,485 – 3,985 is ________ .
pls give answer
Answers
Answer:
The approximate difference between the two numbers are 6,500
Step-by-step explanation:
The computation is shown below:
As in the question it is asked the difference between the two numbers
And, the two numbers are 10,485 and 3,985
So, the approximate difference is
= 10,485 - 3,985
= 6,500
Hence, The approximate difference between the two numbers are 6,500
The same is considered and relevant too
Laine reads 25 pages in 30 minutes.
If Laine reads 200 pages at this same rate, how long will it take her?
Answers
Answer:
i believe it would take laine 4 hrs
Which expression has a value of 15 when n = 7?
A.43-5n
B.3n-5
C.6n-28
D.19- 28/n
Answers
Answer:
The answer is D.
Step-by-step explanation:
28/7 = 4 and 19-4 = 15.
Can someone please help me with math.
Answers
Answer:
D. (8,1)
Step-by-step explanation:
hope this helps :)
The figure is made up of a cylinder and 2 cones. What is the volume of the composite figure? Use 3.14 for Pi. Round to the nearest hundredth.
A cylinder and 2 cones. All have a radius of 2 millimeters. The cones have heights of 4 millimeters and 2 millimeters, and the cylinder has a height of 5 millimeters.
Recall the formulas V = B h and V = one-third B h
Answers
Answer:
87.92
Step-by-step explanation:
I took the unit test review in edge 2021
The figure is made up of a square and a rectangle. How much longer is side FE than A F?
A. 1 foot
B. 2 feet
C. 9 feet
D. 11 feet
Answers
Answer:
2
Step-by-step explanation:
A F = 48
F E = 50
50 - 48 = 2
Thus the answer is 2
the spinner below is spun.What is the probability of spinning
Answers
WHO HAS THE ANSWER!! I DONT GET IT. PLEASE COMMENT THE ANSWER ON MY POST
calculate the surface area of the following cylinders
Answers
Answer:
~1445.13
Step-by-step explanation:
A = 2 x pi x r + 2 x pi x r^2
Answer:
260π or id we take π=3.14 816.4
Step-by-step explanation:
h=13ft
r=10ft
A=2πr(h+r)=2*10*13*π=260π=816.4
rounding off 0nes decimal place 0.09
Answers
Answer:
0.1
Step-by-step explanation:
Since the 9 is greater than or equal to 5, you round up, turning the 0 to 1
Answer:
0.1
Step-by-step explanation:
Find the value of x
48°
132°
132°
X°
Answers
Answer:
X°
Step-by-step explanation:
there’s no other clues to what it could be, and since it’s x it would be X°
(x + 1) (2x - 5) = 0
Answers
(i need this part to post the answer so just ignore it lol)
the price of a phone on sale was increased from $80 to $120. By what percentage was the price of the phone increased?
Answers
Answer:
50% increase
Step-by-step explanation:
120 - 80 = 40
40 = 50% of 80
Answer:
50%
Step-by-step explanation:
120 / 80 = 1.5
1.5 x 100 = 150%
150% - 100% = 50%
HELP ME!!! 20 points!!
Answers
if one zero of the following polynomial 8x^2-13x-4k is the reciprocal of the other, then find k
Answers
Answer:
k = -2
Step-by-step explanation:
2 way to solve:
1st: 8x²-13x-4k = 8(x²-(13/8)x-(k/2))
if 2 roots: a and 1/a
8(x-a)(x-1/a) = 8(x²-(13/8)x-(k/2))
x²-(a+1/a)x+1 = x²-(13/8)x-(k/2)
1 = -(k/2)
k = -2
2nd: 2 roots of 8x²-13x-4k x=(-b±√b²-4ac)/2a
x = (13±√169-4*8*(-4k))/16 = (13±√169+128k)/16
(13+(√169+128k))/16 = 16/ (13-(√169+128k)) ... root1=1/root2
(13+(√169+128k))*(13-(√169+128k)) = 16*16
13² - (√169+128k)² = 256
169-169-128k = 256
-128k = 256
k = -2
could 10.3cm 4.4cm and 8.3 cm be the side lengths of a triangle yes or no
Answers
Answer:
No
Step-by-step explanation:
As you probably know, triangles have 3 sides. The longest side is called the hypotenuse. In this case, the hypotenuse is 10.3. Now, you might or might not know the pythagorean theorem, which states that the a² + b² =c ².
In this case, we can say that 4.4 is a and 8.3 is b. Now if we square 4.4 and add it to 8.3 squared, we get 88.25. However, if you square 10.3, you get 106.09. Thus, the values cannot be this way. So, your answer is no.
A plumbing contractor charges a fee of $100 a visit and an additional charge of $50 per hour. Which equation can be used to find the number of hours x he worked if he gets paid $950 for a day's work?
Answers
Answer:
100 + 50x = 950
100 - 100 + 50x = 950 - 100
50x = 850
50x/50 = 850/50
x = 17
I will give BRAINLEST TO WHO ANSWER !!!!!
Answers
Answer:
a=7 b=24 c=25
Step-by-step explanation:
Leg a=7
Leg b=24
According to Pythagorean theorem: a^2+b^2=c^2
49+576=c^2
C^2=625
c=25
Answer:
Step-by-step explanation:
This is a right triangle, so we may apply the Pythagorean Theorem. The two leg lengths are 7 and 24 respectively, and so the length of the hypotenuse is
√(7² + 24²) = 25
Help help help help help help help help
Answers
Answer:
87,069.6
Step-by-step explanation:
help pls. it’s from khan academy
Answers
step 1: Simplify both sides of the equation.
step 2:Subtract 2/3 from both sides.
step 3: Multiply both sides by 7/(-1).
What is the lateral surface of the triangular prism?
Answers
Answer:
5
Step-by-step explanation:
.............................................................
Answers
Answer:
0.058863
Step-by-step explanation:
Seth can paint one picture in 2 1/2 hours. How many pictures can he paint in 17 1/2 hours?
A. 6
B. 7
C. 8
D. 9
Answers
Answer:
7
Step-by-step explanation:
17 times 60 is 1020
1020 plus 30 is 1050
2 times 60 is 120
120 plus 30 is 150
1050 divided by 150 is 7
Answer:
B.7
Step-by-step explanation:
17.5 divided by 2.5 is 7
Is -2/3(-12b-6+9b-18) equivalent to 2(b+8)? Show your work.
please help.
Answers
Answer:
Step-by-step explanation:
-2/3(-3b-24) = 2(b+8)
6b/3+48/3 = 2b+16
2b+16 = 2b+16 => equivalent
Is -2/3(-12b-6+9b-18) equivalent to 2(b+8)?
To find out, simplify the left side.
Multiply every term in the parentheses by 2/3.
(8b + 4 - 6b + 12)
Simplify.
(2b + 16)
Factor out 2.
2(b + 8)
We conclude that -2/3(-12b-6+9b-18)
equals 2(b + 8).
A teacher randomly selects students to write the date on the board each day. If there are
12
boys and
9
girls in the teacher’s class, what is the probability the teacher chooses a girl to write the date on the board?
Answers
Answer:
75%
Step-by-step explanation:
9 divided by 12 = 0.75
- 75%
what is (-5) × (+5) its about intergers! :)
Answers
Answer:
= -25
Step-by-step explanation:
what is ( 9 x 2/3 ) x 2/3
Answers
Answer: The answer is 4
How much do i save when i use a 30% off coupon on a $175 purchase
Answers
Answer: In this example, if you buy an item at $175 with 30% discount, you will pay 175 - 52.5 = 122.5 dollars.
Step-by-step explanation: