Answer:
X = 14 kg
Y= 7 kg
Step-by-step explanation:
LET X and Y equal the amounts of brand X and Y
X = kg of brand X
Y = kg of brand Y
we know:
1) X + Y = 21 (kg)
2) 1X + 4Y = 2(X + Y) (This is the cost/kg * amounts for total cost)
Coefficients 1,4,2 are the cost/kg)
substitute eq. 1 (X+Y), = 21 into right side of equation 2
1X + 4Y = (21)*2
use elimination to solve 2 equations
X + Y = 21
X + 4Y = 42 (now subtract, note: I wrote the 1X as just X)
------------------
0 -3Y = -21 OR Y = 7 kg so X = (21-7) OR X = 14 kg
is 4/3y=x a direct variation?
is y-7x=0 a direct variation?
is y=2x+4 a direct variation?
Giving Brainliest to the first CORRECT answer. I will delete your answer if you try to just get the points!!! So, I would advise just to answer the question with smarts in reward of Brainliest! :)
Answer:
1 yes 2 no 3 no
Step-by-step explanation:
Can anyone help me with this question
-5(y+10)
Answer:
-5y-50
Step-by-step explanation:
-5(y+10
-5y-50
Answer:
-50
Step-by-step explanation:
help please what is the rate of change
3 algebra questions ill give brainliest!! no random answers or ill report.
Answer:
14)$9,320.00. 15)Chen has 8 nickels, 2 dimes, and 6 quarters. 16)10%
Step-by-step explanation:
14)A = $9,320.00
I = A - P = $1,320.00
Equation:
A = P(1 + rt)
Calculation:
First, converting R percent to r a decimal
r = R/100 = 5.5%/100 = 0.055 per year.
Solving our equation:
A = 8000(1 + (0.055 × 3)) = 9320
A = $9,320.00
The total amount accrued, principal plus interest, from simple interest on a principal of $8,000.00 at a rate of 5.5% per year for 3 years is $9,320.00.
16)R = 1011.1111%/year
Equation:
r = (1/t)(A/P - 1)
Calculation:
Solving our equation:
r = (1/1)((1250/112.5) - 1) = 10.11111111
r = 10.11111111
Converting r decimal to R a percentage
R = 10.11111111 * 100 = 1011.1111%/year
The interest rate required to get a total amount, principal plus interest, of $1,250.00 from simple interest on a principal of $112.50 over 1 years is 1011.1111% per year.
Answer:
203003 203203 x 233 x 2322
The number of calories burned by a 90-pound cyclist is proportional to the number of hours the cyclist rides. The equation to represent this relationship is y = 225x. What is the constant of proportionality?
The constant of proportionality is 225.
Given that,
The number of calories burned by a 90-pound cyclist is proportional to the number of hours the cyclist rides. The equation to represent this relationship is y = 225xBased on the above information, the calculation is as follows:
y = kx
So here the constant should be 225.
Learn more: brainly.com/question/17429689
a pair of jeans cost 35.00. the sales tax is 7%. how much is the sale tax?
Answer:
2.45
Step-by-step explanation:
what is 2(x - 3) + 3y = 0 solve for y :D
Answer:
2x+3y=5
Step-by-step explanation:
Answer:
y-intercept: (0,0)
Please mark brainiest :)
Please help me I have a C in math and the marking period is over this week
Answer:
30%
Step-by-step explanation:
just do 25 x 3 and you get $75
Determine a rational number in between -2 1/4 and -2.8 justify and graph where it would be on a number line
Answer:
Its going to be on the -5, 0 point
Step-by-step explanation:
Please answer ASAP!!! I really need this fast, ty! :)
Answer:
I got -8. Not sure if it's correct though.
Answer:
-8 I could be wrong
Step-by-step explanation:
what is the solution
Answer:
1+1=a a=solution
Step-by-step explanation:
$22.95 shirt, 10% markup and 6% tax
Answer:
I believe its $26.77
Step-by-step explanation:
good luck!
help again please QwQ thank you so much-
Answer:
=30
your welcome haha
Answer:
x=30
Step-by-step explanation:
x/5 = -10+16
x/5 = 6/1
5/5 = 1
x/5 = 6
6x5 = 30
x=30
Angelica is deciding which bank would give her the best simple interest rate on a $300 deposit. One bank says she will have $320 in her account if she leaves the principal for 2 years. Is this enough information for Angelica to find the interest rate?
PLEASE HELP
Answer: No. I don't believe that is enough information.
Step-by-step explanation:
Answer: No
Step-by-step explanation:
You'll need to know what the second bank will do before deciding.
Jason earns $20 per game as a referee in youth soccer games. Write an expression to find how much money Jason will earn for refereeing n number of games. How much will he earn for refereeing 6 games?
plz plz i beg
The correct answer is
20n: $120
$120
The total made would be found by multiplying the amount me makes per game by the number of games he referees.
Total = 20n
To find the total for 6 games replace n with 6:
Total = 20(6)
Multiply:
Total = $120
I WILL GIVE 69 POINTS AND BRAINLIEST TO WHOEVER ANSWERS ALL 5 QUESTIONS
Sheldon harvests the strawberries and tomatoes in his garden.
He picks 125 kg less strawberries in the morning than in the afternoon. If Sheldon picks 214 kg in the morning, how many kilograms of strawberries does he pick in the afternoon? Explain your answer using words, pictures, or equations.
The answer is 336.
oooooooooooo
Help me please im dying becuase of this
Answer:
C
Step-by-step explanation:
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP :O Simple Algebra! I'll give BRAINLIST!!!!!!!! Pls look at the image below. Please do all. Tell me which is equivalent. TY. Quick pls
Answer:
Step-by-step explanation:
There is no picture. Can I have brainly still?
Use the function graphed on the coordinate plane below.
Answer:
Answer #3
Step-by-step explanation:
Also, this is Algebra 2, so it should be in the high school section.
A square has a side length of . Which of the following rational numbers best describes this value?
Answer: 8.7
Step-by-step explanation:
sqare root of 75 is 8.66 so the closest is 8.7
Answer:
8.7
Step-by-step explanation:
[tex]\sqrt{75} =8.66 = 8.7[/tex]
If Brenna's original interest rate was 4.575%, what is her new interest rate after the points purchase
Answer: 7%
Step-by-step explanation:
Thats the answer
4325 divided by 3
please help me on this i will mark brainliest
Step-by-step explanation:
4325÷3=1,441.6666666667 will be rounded to 1442
PLEASE HELP ASAP!!!! WILL GIVE BRAINLIEST
Jesse and Amir were assigned the same book to read. Jesse started reading on Saturday, and he is reading 30 pages a day. Amir didn't start until Sunday, but he is reading 35 pages a day.
How many days will it take Amir to catch up to Jesse, and how many pages will they each have read?
1. Write an equation to represent the number of pages Amir has read. Use x to represent the number of days Amir has been reading and y to represent the number of pages he has read.
2. Write an equation to represent the number of pages Jesse has read.
Using x, the number of days Amir has been reading, write an expression to represent the number of days Jesse has been reading. Remember that Jesse started reading one day before Amir. Use this expression to write an equation for the number of pages Jesse has read. Let y represent the number of pages read.
3. Write the system of equations using your answers from questions 1 and 2.
4. You will use substitution to solve this system. Which variable will you substitute for and why? Show the equation that results from the substitution.
5. Solve the system of equations. Show your work.
Answer:
6 days
210 pages
Step-by-step explanation:
As stipulated by the question, let the number of days Amir has been reading be x and the number of pages he had read to be y.
Now since he reads 35 pages per day.
Which pair of expressions are equivalent?
A
3x+2+2x and 7x
B
8(x−3) and 8x−24
C
4(x+1) and 4x+1
D
3(5x) and 8x
guys need help with this question NOTE: the answer is a mixed number not a whole number.
Answer:
5 2/5
Step-by-step explanation:
A pair of running shoes cost 60.00. The sales tax is 3%. How much is sales tax?
Answer:
$1.8
Step-by-step explanation:
1. What is the simple interest on $4,500 for 2 and a half years at 4% per year?
2. On a loan of $4,500 for 2 1/2 years at 4% per year, how much do you wind up paying to pay off the loan?
3. What is the simple interest on $40,000 for 10 years at 12%?
4. For a loan of $40,000 at 12% for 10 years, how much do you wind up paying back?
Answer: 1st is 180$ sorry if I’m wrong
Step-by-step explanation:
Answer:
1. $450
2. $4950
3. $48,000
4. $88,000
Step-by-step explanation:
I took a test and got these questions correct. I hope this helps!
a triangle has a side length of 13 cm and 5 cm. Which could be the value of the third side. 19 cm or 13 cm?
Answer:
The value of the third slide is 12
Step-by-step explanation:
is 9% of 20 greater than or less than 2?
Answer:
Less
Step-by-step explanation:
10% of 20 = 2. So, 2 does not equal 9% of 20.
Answer:
less than.
Step-by-step explanation:
9% of 20 is 1.8, which is less than 2.