Answer: 30 marks lost
Step-by-step explanation: 80% = 40 question so 100% = 50 questions
he missed 10 of 50 so
10 x 3 = 30 marks
Solve the system of equations
-12x+9y=7
3x+4y=2
Show all workings please
Answer:
x = -2/15 & y = 3/5
Step-by-step explanation:
- 12x + 9y = 7 ...(1) ; 3x + 4y = 2 ...(2)
Multiply both sides of (2) by 4:
12x + 16y = 8
Add the new equation & (1):
12x + 16y = 8
-12x + 9y = 7
0 + 25y = 15 => y = 15/25 = 3/5
Thus, substitute the value of y in (2):
3x + 4y = 2 => 3x = 2 - 4(3/5) = (10-12)/5
=> 3x = -2/5
=> x = - 2/15
Answer:
[tex]x=-\frac{2}{15}=-0.133333333\\y = \frac{3}{5}= 0.6[/tex]
Step-by-step explanation:
−12x+9y=7
3x+4y=2
In order to solve by elimination, coefficients of one of the variables must be the same in both equations so that the variable will cancel out when one equation is subtracted from the other.
−12x+9y=7,3x+4y=2
To make −12x and 3x equal, multiply all terms on each side of the first equation by 3 and all terms on each side of the second by −12.
3(−12)x+3×9y=3×7,−12×3x−12×4y=−12×2
Simplify.
−36x+27y=21,−36x−48y=−24
Subtract −36x−48y=−24 from −36x+27y=21 by subtracting like terms on each side of the equal sign.
−36x+36x+27y+48y=21+24
Add −36x to 36x. Terms −36x and 36x cancel out, leaving an equation with only one variable that can be solved.
27y+48y=21+24
Add 27y to 48y.
75y=21+24
Add 21 to 24.
75y=45
Divide both sides by 75.
y=3/5
Substitute 3/5 for y in 3x+4y=2. Because the resulting equation contains only one variable, you can solve for x directly.
3x+4×(3/5)=2
Multiply 4 times 3/5
3x+12/5=2
Subtract 12/5 from both sides of the equation.
3x=-2/5
Divide both sides by 3.
x=-2/15
The system is now solved.
x=−2/15 ,y=3/5
Rasheed has an account balance of
-$125.56. Does Rasheed owe the bank more or less than $125?
Answer:
Yes, He Owes More
Step-by-step explanation:
he or she owes the bank more money because he is in the negative range, so that means whenever you're in the negative range have to pay someone something (which basically means debt)
____________________________________________________________
Hope this helps!
Please give brainlist!
Answer:
yes rasheed owes more the banck than 125
Step-by-step explanation:
raseed owe the bank 125.56. wich is .56 more than 125
Can someone explain their answer?
Answer: -36
Step-by-step explanation:
13, 6, -1
to get from 13 to 6 and 6 to -1, you would subtract by 7 so keep subtracting by 7 until you get 8 different terms
13, 6, -1, -8, -15, -22, -29, -36
the eighth term would be -36
i hope that makes sense
Best answer gets brainliest help!!
Answer:
option A
Step-by-step explanation:
the answer is a because it says triangle PGR and DEF are similar. The congruent sides are in order so side PG is equal to DE or 4/6
have a great day :D
Please help me with this equation! First person to answer correctly will get Brainliest!!!
Answer:
1. 4 and 3/5
2. 3 and 1/6
Step-by-step explanation:
thats about it
Answer:
1. 4 3/5 or 4.6 2. 3 1/6
Step-by-step explanation:
Pls help me ASAP the plot is on the top I need help with question 16. In class 1 now many students scored 75 or higher. There are 28 students in class one
Answer:
hey
Step-by-step explanation:
The percent of decrease from 69 songs to 37 songs?
Answer:
46.3768%
Step-by-step explanation:
Or 46.38% if you round it to the nearest tenths
The percentage decrease of songs from 69 to 37 songs is 46.4%.
What is the percentage?A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.
Given, The number of songs decreased from 69 songs to 37 songs.
Therefore, The net amount of songs that decreased is,
= (69 - 37).
= 32 songs.
Now to obtain percentage change we'll divide the net amount change by the original amount and multiply it by 100% which is,
= (32/69)×100.
= 46.4%
learn more about percentages here :
https://brainly.com/question/24159063'
#SPJ2
Timed please help!
What is the measure of GHK?
Answer:
GHK = 28
Step-by-step explanation:
Angle GHK and angle JHI are vertical angles
Vertical angles are congruent so
Because angle JHI = 28 then angle GHK also equals 28
Answer:
The GHK is 28
Step-by-step explanation:
can you help me find the slope of these queastions?
Answer:
1. B
2. A
3. I
4. I
These should be correct
Three horses equally share 16 and 1/5 pounds of hay. How many pounds of hay does each horse receive? answer asap plssss
Answer:
They each receive 5.40 pounds of hay
Step-by-step explanation:
16 1/5 ÷3 = 5.40 I checked it by multiplying 5.40×3 and I got the same answer so it should be correct!
help I’m doing a test.... what is 3(2x-9) =
Answer:
6x - 27
Step-by-step explanation:
3 x 2x - 3 x 9 =
6x - 27
Hope that helps!
Answer:
6x - 27
Step-by-step explanation:
Please I need this quick !!!
Answer:
81
Step-by-step explanation:
First we go with exponents, 2x2=4 and 5x2=25. Now we go with what's inside the parentheses so, 4 (Originally 2x2) plus 4 plus 6, which equals 14. Now we multiply 4 and 14, which equals 56. Then we add 56 and 25 which equals 81.
Pls if you can answer it :)
Is Kee
Keelin wants to find the value of t in the equation
}(150 – 30) = 50. Her work is shown below.
Solve: ž (15t – 30) = 50
Choosed
Step 1: 5t -
10 = 50
The equa
Step 2: 5t = 60
Step 3: t = 12
To determ
To find the
Choose
The height of a javelin after it has left the hand of the thrower can be
modeled by the function h = 3(4-2)(-+ + 4), where h is the height of the
javelin and t is the time in seconds. How long is the javelin in the air?
Answer:
-24
Step-by-step explanation:
Solo You just need Make an ecuation
Help!!!!!!!!!!! Me now!!!!!!!!!!
Answer:
29.6 - 0.2 = 29.4
29.4 divided by 24 = 1.225 km
Answer:
1.225
Step-by-step explanation:
29.6-0.2=29.4
24/29.4=1.225
What is the range of y = –3sin(x) – 2?
Answer:
thase is the answer and good luck
i need help finding the y-intercept
Answer: (0, -7)
Step-by-step explanation:
y = mx + b
Where m is slope and b is y-intercept
y = 2x + b
One point that passes through the line is (5,3), which means that x = 5 and y = 3
3 = 2(5) + b
3 = 10 + b
b = -7
(0, -7) is the y-intercept
Using this info you can find the equation of the line
:)
Find the area of the composite shape shown below:
5 in
4 in
2 in
3 in
12 in2
20 in2
22 in2
16 in 2
Answer:
16 inches squared
Step-by-step explanation:
We can split the figure into two rectangles. Rectangle 1 will have an area of 2*3=6. Rectangle 2 will have an area of 2*5=10
10+6=16
HOPE THIS HELPS!!!!!!!!50 POINTS!! Use rules of transformations to answer each of the items below. Be sure to answer in complete sentences, and when necessary, include your calculations.
Create your own set of coordinates for and graph it on a coordinate plane. Label each of the triangle's vertices.
Write a scenario involving the dilation of onto its image. In the scenario, include the scale factor between the similar triangles and the coordinates for the image. Graph the image on the same coordinate plane as its pre-image.
Use the distance formula or Pythagorean Theorem to prove mathematically that is similar to its image. Include all necessary calculations.
Answer:dvd
Step-by-step explanation:ube
Answer:
hmmm
Step-by-step explanation:
Can someone please help!!!!
DO NOT ANSWER IF YOU DON'T KNOW IT PLEASE!!!
Find the difference in the given lengths of the polygons . (7x + 2) units (6x - 5) units .
Answer:
Difference in the lengths of the polygons is (x + 7) units.
Step-by-step explanation:
Lengths of the given polygon = (7x + 2) units and (6x - 5) units
Therefore, difference in the given lengths = (7x + 2) - (6x - 5)
= (7x - 6x) + (2 + 5)
= x + 7
Therefore, difference in the lengths of the polygons is (x + 7) units.
HELP PLEASE!!!! No files btw
Jubal wrote the four equations below. He examined them, without solving them, to determine which equation has no solution.
7 x + 1 = 7 x+ 1. 3 x + 2 = 3 x minus 2. 4 x + 1 = 3 x + 8. negative 2 x minus 1 = negative 2 x minus 1.
Which of Jubal’s equations has no solution?
A. 7 x + 1 = 7 x+ 1
B. 3 x + 2 = 3 x minus 2
C. 4 x + 1 = 3 x + 8
D. negative 2 x minus 1 = negative 2 x minus 1
The answer is B! :)
What is the expression of (5)(x+3)(y+2)
Answer:
The expression of (5)(x+3)(y+3) is a binomial
If 1/2 gallon of paint covers 1/12 of a wall, then how many quarts of paint are needed for the
entire wall?
Answer:
24
Explanation:
½ gallons × 12 = 6 (gallons of paint needed to cover the whole wall)
6 gallons = 24 quarts
i hope this helps! :D
Find the measure of angle m
180° - (60° + 84°) = 180° - 144° = 26°
FIND THE VALUE OF X AND Y PLEASE ILL GIVE YOU BRAINLEST
Answer:
x = 10
y = 50
Step-by-step explanation:
9x - 70 = x + 10
8x - 70 = 10
8x = 80
x = 10
3y - 60 = 90
3y = 150
y = 50
The answer is:
x- 10
y- 50
HELP ILL MARK AS BRAINLIEST what’s the volume?
Answer:
I think 324. Please tell me if wrong. I will try again.
Step-by-step explanation:
9*12*6=648
648/2=324
Evaluate k = 13 helllp noww
Answer:
-13
Step-by-step explanation:
A model car has a length of 10cm. The scale of the model is 1:40. Find the real length of the car
Answer: 400 cm
Step-by-step explanation:
create a ratio
1 is to 40 as 10 is to x
1/40 = 10/x
multiply both sides by 40 and divide by x
x = 400