Answers
To solve a multi-variable problem, you need to isolate single variables. To do this, there are two ways to do it. One way you eliminate one of the variables and the other you substitute.
In this example, you are being asked to eliminate one of the variables. To do this, you multiply 2x+2y= 12 by 2 and get 4x+4y = 24.
See how now both equations contain a 4y?
Using this you can subtract one equation from the other.
5x+4y=28
- 4x+4y=24
And then you get x=4
To get the other variable, you substitute 4 in for x (in one of the equations) and then solve for y.
2(4) + 2y =12
8+2y= 12
2y=4
y=2
Therefore, x = 4 and y = 2
Related Questions
Solve the system using elimination tech
8x-2y=6
-8x+4y=12
x=
y=
in coordinate form:
Answers
Answer:
Step-by-step explanation:
8x - 2y = 6
-8x + 4y = 12
2y = 18
y = 9
8x - 18 = 6
8x = 24
x = 3
(9, 3)
Just need help with changing the y-intercepts of the asymptotes :) please help asap!!!
Answers
Answer:
why do you need do give almost ALL your points when people and your one only question???????????
find the 7th term in the sequence
1/3,1,3,9
Answers
Proof:
3(1) = 3
3(3) = 9
5. 9(3) = 27
6. 27(3) = 81
7. 81(3) = 243
The 7th term is 243.
Write an expression showing 5 less than the number K
Answers
Answer:
k-5
Step-by-step explanation:
Hii i really need help!!
Write a paragraph with 10+ sentences about something math related (algebra 1)
Answers
Answer:
Algebra 1 is the second math course in high school and will guide you through among other things expressions, systems of equations, functions, real numbers, inequalities, exponents, polynomials, radical and rational expressions. ... Mathplanet hopes that you will enjoy studying Algebra 1 online with us!
Step-by-step explanation:
10
Bridget was thinking of a number. Bridget adds 8 to it, then doubles it and gets an answer of 21.9. What was the original number?
Answers
Answer: Bridget was thinking of the number 2.95
Step-by-step explanation:
21.9 / 2 = 10.95
10.95 - 8 = 2.95
A drink is made by adding water to juice.
Instructions
Add an amount of water that is between 3 times and 5 times the amount of juice
Tanya has 130 ml of juice.
If she follows the instructions, work out the minimum and maximum amounts
of the drink she can make.
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Tanya need to learn how to cook \ (•◡•) /
Explain answer !!
( WILL GIVE BRAINLEST)
Answers
Stephanie bought a pair of earrings for $3.25 and a necklace for 5.25. The tax rate is %8. What is the total cost including tax?
Answers
Answer:
9.56? sorry if it is wrong <3
Step-by-step explanation:
Help Needed
-Thanks
Answers
Answer:
− 2 √ 3
Step-by-step explanation:
Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.
Please help
Will give brainlst
Answers
Answer:
The answer is D. 24
Step-by-step explanation:
there are 6 atoms of Carbon, 12 atoms of Hydrogen, and 6 atoms of Oxygen.
If you add them together: 6 + 12 + 6 +24
Question 1 options:
3
8
12
2.5
Answers
Answer:
2.5
Step-by-step explanation:
(I'm assuming you're doing this the same way I learned it, if not I'm sorry if it doesn't make sense)
[tex]\frac{2}{x}[/tex]=[tex]\frac{12}{15}[/tex]
Cross multiply
12x=30
Divide
x=2.5
This is just one way to do the problem. An easier way is to simplify the fractions.
[tex]\frac{2}{x}[/tex]=[tex]\frac{4}{5}[/tex]
You can either cross multiply or figure out that 2 is half of four and simply divide 5 by 2 which will also result in 2.5
Pleas help me ASAP....
Answers
Answer:
I am pretty sure it is D if im not right correct me and if i am right plz mark brainliest
Step-by-step explanation:
-20 greater than or equal to 5w
Hurry!!!
Answers
32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 800 grams while babies born after a gestation period of 40 weeks have a mean weight of 2800 grams and a standard deviation of 370 grams. If a 32-week gestation period baby weighs 2375 grams and a 41-week gestation period baby weighs 2675 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period?
Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice.
(Round to two decimal places as needed.)
A.
The baby born in week 32 weighs relatively less since its z-score, nothing, is smaller than the z-score of nothing for the baby born in week 41.
B.
The baby born in week 41 weighs relatively less since its z-score, nothing, is smaller than the z-score of nothing for the baby born in week 32.
C.
The baby born in week 41 weighs relatively less since its z-score, nothing, is larger than the z-score of nothing for the baby born in week 32.
D.
The baby born in week 32 weighs relatively less since its z-score, nothing, is larger than the z-score of nothing for the baby born in week 41.
Answers
Answer:
Step-by-step explanation:
Answer:
Babies of 33 week weighs relatively less than the babies of 41 week.
Explanation:
Z score is determined by
x-u/sd
A) For 33 Week baby
Given
Mean 2500
SD 800
Z score is
2600-2500/800 =0.125
B) For 41 Week baby
Given
Mean 2800
SD 425
x=2900
Z score is
2900-2800/425 =0.235
The z score depicts that the baby of 33 week or 41 week weighs more than the normal babies of same age group.
Thus, babies of 33 week weighs relatively less than the babies of 41 week.
Heyy plsss helppp it’s important!!!
Answers
Answer:
x is less than or equal to 3
Step-by-step explanation:
The dot is a closed dot, which means that it is something or equal to, and the arrow is pointing down, which means less than. So the sign would be less than or equal to (sorry I don't have that sign on my computer). The dot is on three, so the inequality is x is less than or equal to 3.
A 12-pack of soda costs $10.08 and a 6-pack of the same soda cost $5.34. Which is
the better buy?
Answers
Answer:
the twelve pack
Step-by-step explanation:
12 pack = $10.08 if u get the 6 pack for $5.34 and want to buy two pack it equals $10.68 if you want to save change buy the 12 pack
Ms. Hawkins wants to make awards for her students in the shape of pencils, using the design shown below. What is the area of the award to the nearest tenth of a square inch?
Answers
Answer:
74 in²
Step-by-step explanation:
Area of semicircle :
(πr²) ÷ 2
r = 3
(π * 9) / 2 = 14.137 in²
Area of triangle :
1/2 * base * height
Base = diameter = radius * 2 = 3 * 2 = 6
height = 4 inches
1/2 * 6 * 4 = 12in²
Area of rectangle :
Length * width
8in * 6 in
= 48 in²
Total area of pencil :
(14.137 + 12 + 48) in²
= 74.137 in²
Is one half greater than four fifths
Answers
Answer:
No, it is not greater than four fifths.
Step-by-step explanation:
Well 1/2 of 4/5 would be about 2.5/5. So summing it up. . .
Austen makes $8.15 per hour working for a landscaping company. How much does he make In 7 hours?
Answers
Answer:
57.05
Step-by-step explanation:
Answer:
$57.05
Step-by-step explanation:
$8.15 x 7 = $57.05
400_349 is same as 200_?
Answers
Can you help me put this in least to greater
Answers
Answer: 3.707, 3.71, 3.8, 3.809, 3.83, 3.89
Answer:
Step-by-step explanation:
Remark
They all start with 3, so there is no difference to be had there.
Now you look at the tenths place.
There are two choices there. Both are 3.7. You have to go to the hundredths place to see the difference.
The very smallest one is 3.707. There's a 0 in the hundredth place.
The next one is in the 1 in the hundreds place so the next one is 3.71
That's two of the six taken care of.
3.8 comes next. There's nothing in the hundredths place.
3.809 comes next because it has a zero in the hundredths place.
3.83 is next
3.89 is last and largest.
Answer
3.707 3.71 3.8 3.809 3.83 3.89
88 is the product of 8 and mabel's score use the variable m to represent Mabel score
Answers
9514 1404 393
Answer:
88 = 8m
Step-by-step explanation:
The product of 8 and m (which represents Mabel's score) is written 8m. We are told that is equal to 88.
88 = 8m
Merle opened a new savings account she deposited 40,000 at 10% compounded semiannually at the start of the fourth year merle deposits an additional 20,000 that is also compounded semiannually at 10% at the end od six years the balance in merle account is
Answers
happy first question!!!!
A coach buys a uniform and a basketball for each of the 15 players on the team. Each basketball costs $9. The coach spends a total of $420 for uniforms and basketballs.
Enter the cost, in dollars, of 1 uniform.
Answers
Answer:
I think the correct answer is $19 per uniform.
Step-by-step explanation:
9x15=135 420-135=$285 285 divided by 15 is $19
Hope this is right and helps you!
Answer:
$19
Step-by-step explanation:
Lets make an equation to represent this problem.
The coach is buying each player a basketball ($9) and a uniform, the unknown amount. Lets represent the unknown cost of the uniform with x.
The coach spent a total of $420.
Since the coach is buying 15 basketballs and 15 uniforms, our equation would look like:
15(9) + 15(x) = 420
First, multiply 15 * 9 and 15 * x
We get:
135 + 15x = 420
Subtract 135 from both sides
135 + 15x - 135 = 420 - 135
We get:
15x = 285
Divide by 15 on both sides.
[tex]\frac{15x}{15}[/tex] = [tex]\frac{285}{15}[/tex]
We get:
x = 19
So, 1 uniform equals $19
I would appreciate brainliest, if not that's ok!
Zac is 18 years old.
The ratio of Zac's age to Ed's age is 2:1.
Tim's age is 2/3 Zac's age.
How old is Tim?
Answers
Answer:
Tim is 12 years
Step-by-step explanation:
Given that Zac is 18 years old and Tim's age is 2/3 Zac's age, to compute Tim's age, we would multiply Zac's age with the fraction.
Such that;
Tim's age = 2/3 * 18
= 2* 18/3
= 2 * 6
= 12 years
Hence Tim is 12 years old.
I need the answer too all of these:
1. 7x + 1x = ?
2. 6 + 1 + 5x = ?
3. 4x + 7x + 3 - 2 = ?
4. 6x + 6 + 8 + 1x = ?
5. 7x - 7x + 2 = ?
6. 3x + 6 + 1x = ?
7. 8- 8x - 3 = ?
8. 2x - 5 + 2 =
HELP ASAPP
Answers
2.5x+7
3.11x+1
4.7x+15
5.2
6.4x+6
7.8x-11
8.2x-3
2.) 7 + 5x
3.) 11x + 1
4.) 7x + 14
5.) 2
6.) 4x + 6
7.) 8x - 5
8.) 2x - 3
A deposit of $325 is made to a checking account that pays 4% annual interest, compounded quarterly.
Answers
Answer:
The amount is $338.2 and the interest is $13.20
Step-by-step explanation:
What is the answer to 6/8 ×2 =
Answers
Step-by-step explanation:
= 6 / 8 × 2
= 0.75 × 2
= 1.5
plz follow me
For which equations is 8 a solution? Select the four correct answers.
x + 6 = 2
x + 2 = 10
x minus 4 = 4
x minus 2 = 10
2 x = 4
3 x = 24
StartFraction x Over 2 EndFraction = 16
StartFraction x Over 8 EndFraction = 1
Answers
Answer:
The answers include
x + 2 =10
x - 4 = 4
3x = 24
Start Fraction x Over 8 End Fraction = 1
Step-by-step explanation:
x + 2 = 10; 8 + 2 = 10
x - 4 = 4; 8 - 4 = 4
3x = 24; 3(8) = 24
Start Fraction x Over 8 End Fraction = 1; 8/8 = 1
Equations with solution x = 8 are
x + 2 = 10,
x minus 4 = 4,
3x = 24,
Start Fraction x Over 8 End Fraction = 1
What is equation?An equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Given equations
x + 6 = 2
⇒ x = 2-6
⇒ x = -4
x + 2 = 10
⇒ x = 10 - 2
⇒ x = 8
x minus 4 = 4
x - 4 = 4
⇒ x = 4 + 4
⇒ x = 8
x minus 2 = 10
x -2 = 10
⇒ x = 10+2
⇒ x = 12
2x = 4
⇒ x = 4/2
⇒ x = 2
3x = 24
⇒ x = 24/3
⇒ x = 8
Start Fraction x Over 2 End Fraction = 16
x/2 = 16
⇒ x = 2(16)
⇒ x = 32
Start Fraction x Over 8 End Fraction = 1
x/8 = 1
⇒ x = 8(1)
⇒ x = 8
Hence, equations
x + 2 = 10,
x minus 4 = 4,
3x = 24,
Start Fraction x Over 8 End Fraction = 1
have 8 as solution.
Learn more about equation here:
https://brainly.com/question/1529522
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