Answer:
x = -1
y = 7
Step-by-step explanation:
We have a system of equations and are asked to solve using substitution.
y = -7x
2x - y = -9
Since we have an equation for y by itself, we can plug the first equation into the second.
2x - (-7x) = -9
Distribute :
(-(-7x))
2x + 7x = -9
Add like terms :
9x = -9
Divide 9 by both sides to get x :
x = -1
Now that we know x, we can plug it into the first equation to find y :
y = -7(-1)
y = 7
Find the output, g, when the input, r, is 4.
g=25−3r
plzzzzzz help me i need to finish
Answer: g = 13 / Thats the output
Step-by-step explanation:
g = 25 - 3r
Its telling you the r is 4 since its the input.
g = 25 - 3 ( 4 ) see!! just plug in the number
Now Solve
g = 25 - 12
g = 13
Answer:
g = 13
Step-by-step explanation:
since r = 4, you make the equation :
g=25-3(4)
first you multiply 3 and 4 and you get 12
g=25-12
and 25 - 12 is 13 which equals :
g = 13
Anthony spent $10.24 on his lunch while Margo spent $8.96 on her lunch. Anthony paid with a twenty dollar bill and gave a $2.00 tip. How much did Anthony have left from his twenty dollar bill? A. $0.80 B. $7.76 C. $9.76 D. $12.24
Answer:
$7.96
Step-by-step explanation:
20 - 10.24 = 9.96 - 2 = $7.96
-9x - y = -14
-2x + y = 3
Answer: x = 1 , y = 5
Step-by-step explanation:
A student tries to solve the equation 2(x-7)=x-9. the student's work is shown to the right.
Describe any errors. Then solve the equation correctly
Answer:
I can't see what the student did to solve the equation so I'll just solve the equation step by step here.
Step-by-step explanation:
2(x-7)=x-9
2x-14=x-9 Use distributive property to solve the parenthesis
x-14=-9 Subtract the x on both sides
x=5
Answer:
See step by step
Step-by-step explanation:
He didnt use the distributive property.
How to solve it is
[tex]2(x - 7) = x - 9[/tex]
[tex]2x - 14 = x - 9[/tex]
[tex]x - 14 = - 9[/tex]
[tex]x = 5[/tex]
Evaluate: –mp where m = 4, p = 2
Answer:
-8
Step-by-step explanation:
-4(2)=-8
I like your profile picture
Step-by-step explanation:
given is an amazing anime
Find the image of R(0,6) after the following composition of transformations: Dilation k =1/3, Rotation of 270 degrees.
Answer:
r 0,6 which is 270 degres
Step-by-step explanation:
Given f (x) = 1/2 * x - 5 find f ^ -1 * (x)
Answer: d i think im pretty sure
Step-by-step explanation:
Camila discovers that she has a leak in her front tire after leg 3. How far did she bike before she discovered the leak?
20.93 miles
32.31 miles
20.92 miles
41.85 miles
Answer:
Step-by-step explanation:
Lisa purchased almonds for $3.50 per pound here
de and your estimate
2450 How many pounds of almonds did she
purchase?
Audrina debate Bonnie uses Niners free that her opinion 6 minutes to rebut the opposite option and 5 minutes to summarize what percent of the time did she spend summarizing
Answer
i think its like 20 percent
Step-by-step explanation:
A. given
B. substitution property of equality
C. linear pair postulate
D. definition of a linear pair
Help asap please
7x-5y=1
1 (-3,-2)
2(-2,-3)
3(0,4)
4(4,0)
Answer:
B. 2(-2,-3)
Step-by-step explanation:
First we would plug it in.
7(-2)-5(-3)=1
Combine like terms
-14+15=1
Add
1=1
Therefore, your answer be would B
Select three ratios that are equivalent to 6:16
Answer:
12:38
3:8
24:44
Step-by-step explanation:
al the numbers are multiples equally
Answer:
3:8
Step-by-step explanation:
i dont know how
how i just know
The new house you bought costs $300 000 but is discounted at 20%. What is the final cost?(PLS I NEED HELP)
Answer:
240000
Step-by-step explanation:
20% x 300000 = 60000
300000 - 60000 = 240000
From the list of these numbers 3,5,7,12,15,18,20
What is a factor of 10
i need helpppppppp ??ASAP
Answer:
60.32
Step-by-step explanation:
can someone answer this please
A baker made 9 cupcakes, each a different type. Four people want to share them equally. How many cupcakes will each person get? What is the correct division expression?
Answer:
each person gets 2 1/4 of a cupcake
Step-by-step explanation:
the correct division expression is 9/4=the amount of cupcakes each person gets
Translate and solve: n divided by 8 is −32.
Answer:
n = -256
Step-by-step explanation:
multiply -32 and 8 to find out what n is, in this case n = -256. If you'd like, you can check the answer by dividing -256 by 8.
Compare the numbers using >,<, or =
874,023______874,233
5,493,820______5,492,483
Answer:
<
>
Step-by-step explanation:
We have two sets of numbers and are asked to compare using the <, >, = symbols.
Remember :
< means less than
> means greater than
= means equal to
One thing I was told in 2nd grade when this subject came over for the first time, was to think of the symbol as a crocodile and that it wants to eat the bigger number, with the opening of it being the mouth of the crocodile. Therefore, out of 874,023 and 874,233. Which is the bigger number?
874,223.
<
Now for the second set,
>
After spending many hours studying for your math class, you decide to reward yourself with a case of cream soda. Unfortunately, Corner Market only had a warm case left. You buy several bags of ice and decide to chill it at home. When you get home, the temperature of the soda is 76° F, and you proceed to pack it in ice. After 10 minutes, the temperature cooled to 70° F. If cream soda is best served at 60° F or cooler, how much longer must you wait to enjoy your chilled cream soda?
Answer:About sixteen minutes.
Step-by-step explanation: After you find out that Ten minutes is six degrees you divide ten by six and get 1.666. Then you multiply that by the time remaining and get 16 minutes rounded. or seventeen if you are specific.
-4x - 9 = 19
Find x please! (Please explain how you did it too)
Answer:
x= - 7
Step-by-step explanation:
-4x= 28
x=28/-4
PLEASE HELP I HAVE 3 MORE MINUTES : (
Answer:
Take the square root of both sides of the equation
Step-by-step explanation:
HELP! 50 POINTS! 75 if I chose your answer as the best! easy!
Step-by-step explanation:
Question 1:
In the expression 4y - 6x² + 5 + 9x, there are
4 terms. (4y/6x²/5/9x) A term consists of a coefficient and a variable, or otherwise a constant term like 5.
Question 2:
4(6x - 5) - 7x
= (24x - 20) - 7x
= 17x - 20.
Therefore the correct answers are
the 1st and 2nd options.
Question 3:
3x - 8y + 11x - 4 + 5y
= (3x + 11x) + (5y - 8y) - 4
= 14x - 3y - 4.
The 4th option is correct.
Question 1
There are 4 terms.
They are 4y, 6x^2, 5, and 9x.
Terms are separated by operation signs (+, -, ×, ÷).
Even if a constant is multiplied by a variable, if there isn't a multiplication sign, it's one single term.
Question 2
Use the distributive property. Multiply the term outside the variable by the terms inside.
4×6x = 24x
4×(-5)=-20 (there's a negative sign incase you don't see it)
24x-20-7x
Since 24x and 7x are like terms, you can subtract them.
24x-7x=17x
17x-20
You can see the first and second choices are correct.
Question 3
Combine the like terms.
The like terms are
3x and 11x
-8y and 5y
-4
Add them all.
3x+11x=14x
-8y+5y=-3y
-4
So the expression simplified is...
14x-3y-4
It's the third choice.
GEOMETRY PLZZZZZ HELPPPPP
Answer:
(x,y) becomes (-y,x) so (3,2) would become (-2,3)
16. In the expression a+2a-12c^2, a, 2b, and -12c2 are examples of
O operations.
O terms.
Olike terms.
O equations.
Answer:
Terms
Step-by-step explanation:
Any expression is formed of terms separated by addition or subtraction.
A term can be a number, a variable or the product of multiplying a number and a variable.
Now, the given expression is:
a + 2b + 12c^2
This expression has three terms all separated by addition. These terms are:
a : which is only a variable
2b : which is the product of a number and a variable
12c^2 : which is the product of a number and a variable
Hope this helps :)
If Ira runs at the same rate, how many laps can they run in 20 minutes?
Answer:
it is roughly 15.3 laps (i rounded 1.6666666666667 to 1.7) i'll explain
Step-by-step explanation:
ratio of laps to minutes: 9:12,
20/12 = 1.6666666666667 rounded to 1.7
9 x 1.7 = 15.3
sorry that i had to round and that it is a little off, hoped i helped you tho
There is a bag filled with 6 blue and 5 red marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 of the same colour?
PLZ answer fast urgant help needed!
Answer:
0.5041 = 50.41% probability of getting 2 of the same colour
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
What is the probability of getting 2 of the same colour?
Both blue or both red
Since they are replaced, we have, in each trial:
6 blue from a set of 6 + 5 = 11
5 red from a set of 6 + 5 = 11
Probability of both blue:
Each with 6/11 probability. So
[tex]P = (\frac{6}{11})^2 = \frac{36}{121}[/tex]
Probability of both red:
Each with 5/11 probability. So
[tex]P = (\frac{5}{11})^2 = \frac{25}{121}[/tex]
Total:
[tex]p = \frac{36}{121} + \frac{25}{121} = \frac{61}{121} = 0.5041[/tex]
0.5041 = 50.41% probability of getting 2 of the same colour
The cost of five books is $36.25. What is the unit price?
Step-by-step explanation:
Cost of 5 books = $ 36.25
Cost of 1 book = $36.25 / 5 = $ 7.25
The unit price is $ 7.25
Hope it will help :)
Wyatt took a taxi from his house to the airport. The taxi company charged a pick up fee of $1 plus $2 per mile. The total fare was $29 not including the tip. How many miles was the taxi ride
Answer:
THe taxi ride was 18 miles
Step-by-step explanation:
I know this because 14x2=28 and they said the total was $29 and there was a $1 pickup fee
Answer:
14 miles
Step-by-step explanation:
29(the total sum) minus 1(the base fee) 28 divided by 2 equals 14 miles