Answers
Answer:
(1, - 2 )
Step-by-step explanation:
Given the equations
9x + 2y = 5 ( subtract 9x from both sides )
2y = 5 - 9x ( divide terms by 2 )
y = 2.5 - 4.5x → (1)
7x - 3y = 13 → (2)
Substitute y = 2.5 - 4.5x into (2)
7x - 3(2.5 - 4.5x) = 13
7x - 7.5 + 13.5 = 13 , that is
7x + 6 = 13 ( subtract 6 from both sides )
7x = 7 ( divide both sides by 7 )
x = 1
Substitute x = 1 into (1) and evaluate for y
y = 2.5 - 4.5(1) = 2.5 - 4.5 = - 2
solution is (1, - 2 )
Related Questions
The width of a rectangle is 5 less than the length and the perimeter is 70. Find the dimensions of the rectangle
Answers
Answer:
L= 40
W= 35
Step-by-step explanation:
The solution is in the attached file
its asking to calculate the mean and median of jonhathan grades and tristian grades?
Answers
Median=96
Mean=80
And
Tristian
Median=81
Mean=81
i will mark u brainliest please help
Answers
Answer:
30+(2x+7)+63=180(sum of angles of triangle )
30+2x+7+63=180
2x+100=180
2x=180-100
x=80/2
x=40
Answer:
[tex]\boxed {\boxed {\sf (2x+7)+30+63= 180}}[/tex]
[tex]\boxed {\boxed {\sf x=40}}[/tex]
Step-by-step explanation:
We are asked to write an equation to solve for x and use the equation to find x.
We know that the angles in a triangle must add to 180 degrees. Therefore, the sum of the three angles in this triangle: 30, 63, and (2x+7) must equal 180. We can set up an equation.
[tex](2x+7)+ 30 +63= 180[/tex]
Now we can use the equation to solve for x. First, we combine like terms on the left side of the equation. The 3 terms without variables or constants can be added.
[tex]2x+ (7+30+63)= 180[/tex]
[tex]2x+ (100)= 180[/tex]
We are solving for x, so we must isolate the variable. 100 is being added to 2x. The inverse operation of addition is subtraction. Subtract 100 from both sides of the equation.
[tex]2x+100-100= 180-100 \\2x=180 -100 \\2x=80[/tex]
x is being multiplied by 2. The inverse operation of multiplication is division. Divide both sides of the equation by 2.
[tex]\frac {2x}{2}= \frac{80}{2}[/tex]
[tex]x= \frac {80}{2} \ \\[/tex]
[tex]x=40[/tex]
The equation is (2x+7)+ 30+63= 180 and x is equal to 40.
What is the value of the expression below when z=2? 5z^+3z+7
Answers
Answer:
you just use BODMAS which means on the value z you should put brackets and replace it with 2 then you multiply
-3/4(8n+12)=3(n-3) show work pls
Answers
Answer: n = 0
Step-by-step explanation:
Given expression
(-3/4) (8n + 12) = 3 (n - 3)
Expand parentheses and apply the distributive property
-6n - 9 = 3n - 9
Add 9 on both sides
-6n - 9 + 9 = 3n - 9 + 9
-6n = 3n
Subtract 3n on both sides
-6n - 3n = 3n - 3n
-9n = 0
Divide -9 on both sides
-9n / -9 = 0 / -9
[tex]\boxed{n=0}[/tex]
Hope this helps!! :)
Please let me know if you have any questions
Answer:
0
Step-by-step explanation:
-3/4(8n+12)=3(n-3)
-24/4n-36/4=3n-9
-6n-9=3n-9
-6n-3n-9=-9
-9n-9=-9
-9n=-9+9
-9n=0
n=0/-9
n=0
Please mark me as Brainliest if you're satisfied with the answer.
josh and karl are 119 miles apart, traveling towards each other. If Victoria travels 12 mph and Alejandra travels 5 mph how long until they meet?
Answers
Answer:
v1+v2= 12+5= 17
T= s : (v1+v2)=119: 17= 7
Step-by-step explanation:
Somebody please help meee and get the correct answer cause if you give me the correct answer you get brainlist
Answer ASAP
If you know this
Answers
Answer:
x2 because it is not an equation
Step-by-step explanation:
Angle A measures 50 degrees. If angle A is rotated 45 degrees, what is the measure of angle A'?
45 degrees
50 degrees
95 degrees
180 degrees
W
Answers
Answer:
oof i haaaaaate pre algebra
Step-by-step explanation:
well, i THINK tis is right, Jay.
95. because it IS 50 degrees. so if you ROTATE it 45, then your basically adding it together.
Ur friend, Chad_da_Fox
Answer:
95 degrees would Be your Answer!
Step-by-step explanation:
is 365458 is divisible by 4.
Answers
Answer:
No. 365458 is not divisible by 4. hope this helps
Step-by-step explanation:
- Zombie
Answer:
No
Step-by-step explanation:
it is not divisble by 4
Value of (2/3) -4 for algebra
Answers
Answer: The value of 2/3 × 4 is equal to a fraction 8/3.
Which is better to buy? 4-foot piece of ribbon for $7.68 or 544-inch piece of ribbon for $65.28
Answers
Answer:
4 foot ribbon
Step-by-step explanation:
Answer:
544
Step-by-step explanation:
$7.68 x 540 = 4,147.2
Which is better to buy? 3-yard roll of wrapping paper for $7.02. 8-foot roll of wrapping paper for $7.36
Answers
Answer:
3 yard roll of wrapping paper for $7.02 is better to buy.
Step-by-step explanation:
1 yard = 3 foot
3 yard = 9 foot
$7.02 / 9 foot = $0.78/foot
$7.36 / 8 foot = $0.92/foot
0.78 < 0.92
Therefore, 3 yard roll of wrapping paper for $7.02 is better to buy.
f(x) = -x^2+3
find f(-2)
Answers
f(x) = -x² + 3
f(-2) = -(-2)² + 3 = -4 + 3 = -1
Answer → f(-2) = -1
A student says that the equation of the line that passes through the points (6, 1) and (6, 3) cannot
be written. Explain your thoughts on this statement. (Hint: examine the coordinates of the two
points carefully. What do you notice?)
I WILL MARK BRAINLYEST
Answers
Answer:
the points are very close together
Find the value of a-4 when a=15 .
Answers
Answer:
= 11
Step-by-step explanation:
a - 4 if a = 15
so, 15 - 4 = 11
A manager at a bus company wants to survey employees about the new uniforms. Which of the following best describes a stratified sample of employees?
a. The manager uses a computer program to draw 78 employees at random and selects these employees. Every set of 78 employees is equally likely to be drawn by the computer program.
b. The manager forms 6 groups of employees based on the departments the employees are in. Then, she selects 13 employees at random from each group.
c. The manager asks for volunteers and selects every volunteer until 78 employees are selected. She selects the volunteers because these employees are easily accessible.
Answers
At the beginning of the 20th century, they were built to compete against roads by offering greater road flexibility, and the further calculation can be defined as follows:
The software program in each collection of 78 workers would be likely to be drawn from the software. This kind of huge autonomous, wheeled car, usually on a fixed route, is used to transport passengers. The bus company management wants to look into the new uniforms for staff. The manager draws 78 people at random with such a computer program and selects those. The stratified sampling of employees can ideally be drawn from the set of 78 employees through the computer program.Following are the description of the wrong choice.
In option b, it is wrong because creating a group of employees is not good because after that we select the employee randomly.In option c it is wrong because in this question we select employees only.Therefore, "Option a" is correct.
Learn more:
brainly.com/question/13729084
what is 21+17⋅2−15+1 Simplified?
Answers
Answer:
41
Step-by-step explanation:
Answer:
41
Step-by-step explanation:
21 + 17⋅2 − 15 + 1
=> 21 + 34 - 15 + 1
=> 55 - 15 + 1
=> 40 + 1
=> 41
What is the quotient when 8x^3-5x^2+x+2 is divided by x^2
Answers
Step-by-step explanation:
[tex]8 {x}^{3} - 5 {x}^{2} + x + 2 \div {x}^{2} [/tex]
[tex]8 {x}^{3} - 5 {x}^{2} + x + \frac{2}{ {x}^{2} } [/tex]
[tex] = \frac{8 {x}^{5} - 5 {x}^{4} + {x}^{3} + 2}{ {x}^{2} } [/tex]
I really need help in this 7th grade math
Answers
Answer:
the awnser is 28
Step-by-step explanation:
the little 2 mean you times the 3 by it so it's 1+6. which is 7 and 18+2 is 20 and 20+7 is 28
2. SALES TAX Suppose that a state sales tax is 7%. Make a table showing the
amount of tax on items with prices of $6, $8, $10, and $12. How can you
find whether the price and amount of sales tax are linearly related?
Answers
Answer:
$6 * .07= 0.42 tax
6+042= $6.42
$8*.07=0.56 tax
8+.56= $8.56
$10*.07=0.70 tax
10+0.70=$10.70
$12*.07=0.84 tax
12 + 0.84=$12.84
the sum of 88 elephants and x elephants is 145 elephants
Answers
Answer:
57 (if your solving for x)
Step-by-step explanation:
88 + x = 145
You subtract 88 from both sides
88 + x = 145
-88 -88
0 + x = 57
x = 57
Mr. Santiago can buy light fixtures in packages of 12 and light bulbs in packages of 9. He bought the fewest number of light fixtures and light bulbs so that there is exactly one bulb per fixture with none left over.
How many packages of light fixtures and how many packages of light bulbs did Mr. Santiago buy?
I WILL GIVE BRANLIEST PLEASE HELP AND RIGHT ANSWER
Answers
Answer:
3 and 4 packagesStep-by-step explanation:
We need to find the LCM of 12 and 9.
9 = 3*312 = 2*2*3Their LCM is:
LCM(12, 9) = 2*2*3*3 = 36Number of light fixtures and light bulbs is 36.
Number of packages will be:
36/12 = 3 and36/9 = 4 respectively.Step-by-step explanation:
First finding LCM of 9 and 12
9 = 3 × 3
12 = 2 × 2 × 3
LCM = 3 × 2 × 2 × 3
LCM = 36
Now,
No. of light fixtures = 36/12 = 3
No. of light bulb = 48/12 = 4
Solve 124m – 23=34 for m.
Question 5 options:
m = –12
m = 36
m = 34
m = 12
Answers
Answer:
[tex]124m - 23 = 34 \\ 124m = 34 + 23 \\ 124m = 57 \\ \frac{124m}{124} = \frac{57}{124} \\ m = 67[/tex]
Answer:
m = 34
Step-by-step explanation:
-.0666
Rational or
Irrational?
WHY
Answers
Answer:
It's irrational
Step-by-step explanation:
An irrational number can be written as a decimal, but not as a fraction. An irrational number has endless non-repeating digits to the right of the decimal point.
Answer:
Rational
Step-by-step explanation:
Irrational numbers go on FOREVER.
An example is
1. π
2.[tex]\sqrt{2}[/tex]
....
Surds are irrational. A surd is a square root of a number that goes on forever.
Some irrational numbers have recurring digits (repeating digits)
10/3 is an example:
3. 333333333333333333333333333333333333333333............
. Find the sum of the first 20 terms of the
arithmetic sequence 27, 22, 17, ....
Answers
Answer:
Step-by-step explanation:
a = 27
n = 20
d = -5
L20 = 27 + (n - 1)*d
L20 = 27 + (20-1)*_5
L20 = 27 + 19*-5
L20 = -68
Sum = (a + L)*n/2
Sum = (27 - 68)*20/2
Sum = -41 * 10
Sum = - 410
5 + (-8) - (-10)
please help
Answers
Answer:
-7
Step-by-step explanation:
5 + (-8) - (-10)
5 - 8 + 10
-3 + 10
7
Answer:
7
Step-by-step explanation:
TUrns into 5-8-(-10)
5-8+10
PEMDAS the answer and youll get 7
extra points for this one. please help
Answers
If I pick a city, say NYC, and ask, “What are the professional sports teams in NYC?” there are more than one pro sports teams.
For this to be a function, there needs to be only one answer to the question.
Option A has only one answer to “How much electricity did this home use this month?”
Option B has only one answer to “What is ____ ranking right now?”
Option C is just weird, but the question of “How many hours are there in __ days?” has only one answer. (24 x the number of days)
Again, D has the possibility that a single city has more than one pro sports team.
Which fraction is equivalent to
?
-3/2
Answers
Answer:
3/-2
Step-by-step explanation:
bc the other ones don't make sense To get an equivalent fraction all we have do to is multiply it by 2...
Although she’s only in middle school, Tameka loves to drive go - carts! Her favorite place to drive go - carts, driver’s delight, has 3 circulas tracks. Track 1 has a radius of 60 feet. Track 2 has a radius of 85 feet. Track 3 has a radius of 110.
A. Compute the circumstance of Track 1.
B. Compute the circumstance of Track 2.
C. Compute the circumstance of Track 3.
D. Driver’s delight is considering building a new track. They have a circular space with a diameter of 150 feet. Compute the circumference of the circular space.
Answers
Answer:
Although she's only in middle school, Tameka loves to drive go-carts! Her favorite place to drive go-carts, Drivers Delight, has 3 circular tracks. Track 1 has a radius of 60 feet. Track 2 has a radius of 85 feet. Track 3 has a radius of 110 feet.
a. Compute the circumference of Track 1.
b. Compute the circumference of Track 2.
Step-by-step explanation:
Assume a fair, six sided die is rolled four times. What is the probability of rolling at least one six?
Answers
Answer:
6
Step-by-step explanation:
6 slided die is rolled four times so 4×6 so if u do it 1 time 6×1=6
Answer:
There is 2/3(66.66%) probability of rolling a 6 at least once.
Step-by-step explanation:
6- total sides
4- rolls
4/6 = 66.66% chance
