Answers
Answer:
(-4, -1) (see below)
Step-by-step explanation:
Substitution means that you actually replace, or "substitute," the value of the variable in.
Here, y = -1, so -3x - 8y = 20 can be written as:
-3x - 8 (-1) = 20
We can now solve for x:
-3x + 8 = 20
-3x = 12
x = -4
Putting this into (x, y) format equals:
(-4, -1)
Related Questions
The digits of a two-digit number sum to 8. When the digits are reversed, the resulting number is 18 less than the original number. What is the original number?
26
35
53
62
Answers
Answer:
original number = 53
Step-by-step explanation:
In two digits number:
Let the tens place digit be x and units place digit be y.
So,
Original number = 10x + y
Number obtained after reversing the digits = 10y + x
According to the first condition:
x + y = 8.... (1)
According to the second condition:
10y + x = 10x + y - 18
10y + x - 10x - y = - 18
9y - 9x = - 18
-9(x - y) = - 18
x - y = - 18/(-9)
x - y = 2.......(2)
Adding equations (1) & (2), we find
x + y + x - y = 8 + 2
2x = 10
x = 10/2
x = 5
Plug x = 5 in equation (1), we find:
5 + y = 8
y = 8 - 5
y = 3
10x + y = 10*5 +3 = 50 + 3 = 53
Hence, original number = 53
Hey guys can you please help me with this math problem?
Answers
Answer:
77777777
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
its a because it has a greater base value
The factors of p2-2pq+q are
Answers
Answer:
Unsure
Step-by-step explanation:
did you forget the q^2
if so,
(p-q)^2
if not,
you can't simplify any further
Answer:
qp 2
Step-by-step explanation:
HELP PLEASE!!!! 50 POINTS!!!GIVING BRAINLIEST!!
1. Elena donates some money to charity whenever she earns money as a babysitter. The table shows how much money, d, she donates for different amounts of money, m, that she earns.
a. What percent of her income does Elena donate to charity?
b.Which quantity, m or d, would be the better choice for the dependent variable in an equation describing the relationship between m and d.
PLEASE HELP!!! THANK YOU!!❤️
Answers
(a). Elena donates 12% of her income.
(b). d (amount donated) will be a better choice for the dependent variable, as it is always dependent on the income of Elena.
What is a dependent variable?You can control or set the independent variable. It affects the dependent variable, which changes as a result. The input is unrelated to the result, which is the dependent variable.
As per the given data:
money donated from money earned is given in the table.
For percent of her income donated to charity:
Total money donated / Total money earned
= (4.44 + 1.80 + 3.12 + 3.60 + 2.16) / (37 + 15 + 26 + 30 + 18)
= (15.12)/(126)
= 0.12
∴ Elena donates 12% of her income.
Hence, Elena donates 12% of her income and d (amount donated) will be a better choice for the dependent variable as it is always dependent on the income of Elena.
To learn more on dependent variable, click:
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The area (in square inches) of a rectangle is given by the polynomial function A(x) = x^2+ 10x + 24. If the width of the rectangle is (x + 6) inches, what is the length
Answers
Answer:21
Step-by-step explanation:
Practice
You bought shoes for $39 that were marked 20%
off. You have to pay
9% tax. What is the total for
the shoes?
Answers
Answer: $34
Step-by-step explanation:
39 x 0.2 = 7.80, the discount
39 - 7.80 = 31.20
31.20 x 0.09 = 2.80, the tax
31.20 + 2.80 = 34
Total cost for the shoes: $34
Answer:
24.99 dollars
Step-by-step explanation:
24 is 20 percent of 39
There are six cups which each hold 340ml. What is the total ml
Answers
Answer:
2040ml
Step-by-step explanation:
Answer:
2,040
Step-by-step explanation:
1 cop =340
multiply 340 six times
the answer will be 2,040
You walk 1/4 miles to a shoe store. Then you walk another 2/5 miles to a music store. How many miles ha r you walked in all?
Answers
Answer and Step-by-step explanation:
[tex]\frac{13}{20}[/tex], or 0.65 miles.
Convert both to common denominator, then add together.
They have a common denominator of 20.
[tex]\frac{1}{4}[/tex] × [tex]\frac{5}{5} = \frac{5}{20}[/tex]
[tex]\frac{2}{5}[/tex] × [tex]\frac{4}{4} = \frac{8}{20}[/tex]
[tex]\frac{5}{20} + \frac{8}{20} = \frac{13}{20}[/tex]
Answer:
I would walk [tex]\frac{13}{20}[/tex] or 0.65 miles.
Step-by-step explanation:
[tex]\frac{1}{4}[/tex] + [tex]\frac{2}{5}[/tex] = [tex]\frac{5}{20}[/tex] + [tex]\frac{8}{20}[/tex] = [tex]\frac{13}{20}[/tex] or 0.65
a polygon has 10080° as the total interior angle how many sides has the polygon
Answers
The formula for the sum of the interior angles of a polygon is (n - 2) * 180. In this formula, N is the number of sides. So, to find the number of sides that a polygon with an interior angle measure of 10080 has, we'll set the formula equal to 10080.
10080 = (n - 2) * 180
Divide both sides by 180
56 = n - 2
Add 2 to both sides
n = 58
Hope this helps!! :)
Answer:
58 sides
Step-by-step explanation:
The sum of the interior angles of a polygon is 10,080°
n = the number of sides
(2n - 4)90 = 10080
2n - 4 = 10080/90 = 112
2n = 116
n = 58.
7
8. 74%,
0.68
10'
7
0.68,
to
74%
10?
b. 0.68, 74%,
10
74%. 0.68
10
7
74%, 0.68
10'
Answers
A set of buttons sells for $2.75 and costs $0.55 to make. Twenty percent of the profit (the difference between the purchase price and the amount it costs to make) from each set of pencils goes to RMS. If 500 sets are sold, what is the amount of money that will go to the school? i will give brainlyest A
$195.00
B
$220.00
C
$275.00
D
$310.00
Answers
Answer: b
Step-by-step explanation: I am 95% sure
Define the range of the following:
Answers
Answer:
{-2, 3, 4, 5}
General Formulas and Concepts:
Math
Number LineAlgebra I
Range is the set of y-values that are outputted by function f(x)Builder Set Notation {x}Step-by-step explanation:
According to our graph, our y-values are 3, 4, 5 and -2. Since they are all closed dots, they are inclusive in the range:
Remember to put it in number line order.
{-2, 3, 4, 5}
Please help I’m completely stuck
Answers
Answer: 8x
Question 2:Answer: 12x - 3y
hope it helps.
If you spend 7.5 hours a week studying for English and 6.5 studying for math what is the ratio of time spent in math to studying for English
Answers
Answer:
6.5:7.5, or 1.3:1.5
Step-by-step explanation:
Simply find the number of hours studied for math (6.5) and hours studied for English (7.5) and put it into ratio form (6.5:7.5). Then simplify to get 1.3:1.5. Watch out for the wording.
Answer:
1.3 : 1.5
Step-by-step explanation:
Math : English
6.5 : 7.5 = 1.3 : 1.5
Peter is writing about characters in wonder by r j palacio but somehow jack Will got that I had smiled at him
Answers
Answer:
.
Step-by-step explanation:
Answer:
Peter is writing about characters in Wonder by R. J. Palacio.But somehow Jack Will got that I had smiled at him. And he smiled back. Homework: A Necessary Evil Some people say homework is the most important teaching tool.
At the beginning of the Occupation, the Nazis basically let the Jews go about their business. This all changes in October 1940. Measures are introduced one after the other. Civil servants must sign an official declaration stating whether they are Jewish or not. Just like in Germany earlier on, Jewish civil servants and teachers are fired from their jobs. At the beginning of 1941, all Jews in the Netherlands must register.
Step-by-step explanation:
300
[tex]300 \div 0.5[/tex]
what is the answer
Answers
-4x+9y=9
3y-6=x
Solve the system of equations and fill in the blanks
X=
Y=
Answers
Step-by-step explanation:
the answer for x = 9
the answer for y = 5
What is the value of C in the equation 12c - 53 = 91?
(-2, -4)
(1, -1)
(2, -2)
(4, -4)
Answers
Answer: 12
Step-by-step explanation:
C=12 because u do 91+53 =144 then 144/12=12
C=12
ASAP
Can someone help me with 2-10 I understand the first problem but I'm not really sure how to do the others.
Answers
Answer:
A e3 x0 +
Step-by-step explanation:
Vertical angles are congruent.
Find the measure of angle x.
X
38°
X =
[?]
Enter
Answers
Answer:
Angle x is 38.
Step-by-step explanation:
If its congruent it means it is equal. Vertical angles are equal to each other.
The measure of x is 38°.
What are corresponding angles?The angles that are in the same position on two parallel lines intersected by a transversal line on the parallel lines.
Corresponding angles are equal.
We have,
Vertical angles are congruent.
x° and 38° are vertical angles.
Now,
x° = 38°
Thus,
The value of x is 38°.
Learn more about corresponding angles here:
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A color printer prints 10 pages in 4 minutes. How many minutes does it take per page?
Answers
Answer:
2/5 minute OR 24 seconds
Step-by-step explanation:
4/10 = 2/5 minute
Hope that helps!
I have no idea what to do help me solve this please and please provide an explanation.
Question: what is the value of x?
Answers
Answer:
x = 48 (in degrees, I assume)
Step-by-step explanation:
Note that the two horizontal lines have those extra arrowheads on them? The red ones? That notation means those lines are parallel to each other.
In geometry, we learn that when two parallel lines are crossed by a third line (called a 'transversal'), alternate interior angles are congruent.
The two angles with labeled quantities are alternate exterior angles. They are 'alternate' because they are on opposite sides of the transversal line, and 'exterior' because they are above and below the the two horizontal lines, not contained in the interior area between them.
Therefore, 2x + 2 = x + 50
-x - 2 = -x - 2
x = 48
A rectangular banner measures 3 ft by 7 ft. How much material do you need for seven banners?
Answers
WILL MARK BRAINLYEST AND 50 POINTS
Give a detailed explanation as to why you chose the answer you chose
Answers
HELP ME PLEASE NOBODY IS ACTUALLY HELPING THIS OS SO HARD AND IM STUCK 7TH GRADE MATH
WNBA Mean:__________
WNBA Mean Absolute Deviation:_________________
NBA Mean:___________________
NBA Mean Absolute Deviation:_______________________
The variability in heights is only different by _____________ inches.
Answers
Answer:
1. 72 [tex]\frac{5}{11}[/tex]
3. 79 [tex]\frac{5}{6}[/tex]
Step-by-step explanation:
The mean is found by dividing the sum of the inputs by the total number of inputs.
Answer:
enjoy your day hope the answer comes to you
Step-by-step explanation:
Doug rents a kayak for 12 days the rental charges 18 per day what is the best estimate for the total cost of the kayak rental
Answers
Answer:
200
Step-by-step explanation:
I rounded both numbers and multiplayer them.
Find the ratio created when AB is partitioned by C.
Write your ratio with a, : and do not include spaces.
Answers
Answer:
Step-by-step explanation:
From the picture attached,
Segment AB has been divided into four equal parts.
Let each part measures equal length = 1 unit
Point C is 2 units apart from both the points A and B.
Length of AC = Length of BC = 2 units
Therefore, point C will be the mid point of segment AB.
And ratio of AC and BC = 1:1
AC:BC = 1:1
Similarly, AC:AB = 2:4
= 1:2
And BC:AB = 2:4
= 1:2
The atomic mass of a chemical element is the number of protons + number of neutrons in each atom of that element—electrons are ignored. Examples The atomic mass of hydrogen (H) is 1 (1 proton) and that of helium (He) is 4 (2 protons + 2 neutrons).
The gram atomic mass of a chemical element is the atomic mass of that element in grams. Example The gram atomic mass of H is 1 gram and that for He is 4 grams.
Astounding Fact There are approximately 6 x 1023 atoms in the gram atomic mass of every known chemical element. Examples There are 6 x 1023 atoms in 1 gram of H and in 4 grams of He. Hence, there are 12 x 1023 atoms, or 1.2 x 1024 atoms, in 2 grams of H and in 8 grams of He.
Standard carbon is Carbon 12, abbreviated C-12. Its atomic number is 12 (6 protons and 6 neutrons) and its gram atomic mass is therefore 12 grams.
How many atoms are there in 96 grams of C-12? (Read the exponents carefully.)
(a) 1.2 x 1024 atoms (b) 12 x 1023 atoms (c) 4.8 x 1023 atoms
(d) 4.8 x 1024 atoms (e) 96 x 1024 atoms (f) none of the above
Answers
Answer:
Step-by-step explanation:
First the gram will use the chemical explanation then you will put 1h gram the atomic mass .Then add 6 x 1023
Done done
I need to find the volume
Answers
Answer:
[tex]941 in^{3}[/tex]
Step-by-step explanation:
Which of the following are characteristics of the cubic parent function? Select all that apply .
Answers
Answer:
A C & D
Step-step explanation: