Answer:
x = 1 and y = 7
Step-by-step explanation:
First, you substitute the y into the first equation
-5x+2(7x)=9
-5x+14x=9
9x=9
x=1
Then put the x into the equation to find y
This is if you substitute using the second equation
y=7(1)
y=7
unitary method examples.
Answer:
For example, if a car runs 44 km on 2 litres of petrol then we can use the unitary method to find out the kilometres it will cover on 1 litre of petrol. In other words, the method by which we find out the value of one unit and further use it to find the value of multiple units is known as the unitary method.
Step-by-step explanation:
Hope this helps!
5 stars and a thank you
Answer:
ok
Step-by-step explanation:
Rst is a right triangle rs=12 rt=20 st=15 what is sin r
Answer:
3/4 (0.75)
Step-by-step explanation:
sin r = 15/20 = 3/4 (0.75)
The length of a rectangle is 4 inches greater than the width. The perimeter of the rectangle is 24 inches. What are the dimensions of the rectangle
Answer:
L=8, W=4
Step-by-step explanation:
2L+2W=p
2(4)+2(8)=p
8+16=24
Answer:
length = 8 in.; width = 4 in
Step-by-step explanation:
simplify x X x^5 divided by x^2 X x
Answer:
[tex]\huge\boxed{(x\cdot x^5):(x^2\cdot x)=x^3}[/tex]
Step-by-step explanation:
[tex](x\cdot x^5):(x^2\cdot x)\qquad|\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=x^{1+5}:x^{2+1}=x^6:x^3\qquad|\text{use}\ a^n:a^m=a^{n-m}\\\\=x^{6-3}=x^3[/tex]
Answer:
X × X^5 ÷ X^2 ×X
X^3
because the same variable can be cancelled.
Fill in the blank to complete the equation below. 99 + 33 = 11(?+3)
Answer:
? = 9
Step-by-step explanation:
you know 99 + 33 = 132 so you can substitute that: 132 = 11 (? + 3). im going to change ? into x for now: 132 = 11 (x + 3). then distribute the 11 so 132 = 11x + 33. then subtract 33 from both sides (99 = 11x) and divide both side by 11 (x = 9) and you get 9!
hope this helps!
PQ and RS are two lines that intersect at point T, as shown below:
Two lines PQ and RS intersect at point T. Angles PTR and STQ are shown congruent.
Which statement is used to prove that angle PTR is always equal to angle STQ?
choices:
a. Lines PQ and RS do not have a fixed length.
b. Angle PTR and angle PTS are supplementary angles.
c.Lines PQ and RS intersect at an angle less than a right angle.
d.Angle PTR and angle PTS are complementary angles.
Answer:
theres a spot with a link icon where you can upload an image
Step-by-step explanation:
you just have to ss it first and then it will show up when you go to upload
are these two photos the same? or is there a difference?
Answer:
Yes on one picture it says -40 and on the other one it says -4 so there is a differemce.
Step-by-step explanation:
what two numbers multiply to -36 and add up to 5
Answer:
9 and -4
Step-by-step explanation:
Finding these 2 numbers can be found by guessing and checking. By doing this, it will get you the numbers 9 and -4.
First, test if they multiply to -36:
9(-4)
= -36
Then, check if they add up to 5:
9 + (-4)
= 5
So, 9 and -4 are the 2 numbers that multiply to -36 and add to 5
how we find persentage of 200/300
The momentum of an object, p, is determined by its mass, m, and its velocity, v. The formula for this relationship is shown.
P=mv
Which equation shows the formula correctly solved for v?
A. V=m/p
B. V=p/ m
C. V= p-m
D. V=pm
Answer:
b
Step-by-step explanation:
Alex chose a pair of jeans that sells for $19.50, but today all jeans are on sale for 10% off. How much will Alex save. Explain your answer.
Answer:
He saves $1.95. Instead of paying $19.50, He pays $17.55
Step-by-step explanation:
$19.50 ×10/100 = $1.95
That is the discount of the jeans. Taking
$19.50 - $1.95 = $17.55
simplify -50 1/2+(-12.3)
Answer:
-62.8
Step-by-step explanation:
-50 1/2 + (-12.3)
= -101 / 2 - 12.3
= -101 - 24.6
2
= -125.6 / 2
= -62.8
Answer: you can use a website called math. way! Make sure its online like the website
Step-by-step explanation:
its a mathpage and it does algebra!
Andre and Elena are solving this system of equations.
Y=3x
Y=9x-30
Andre’s first step is to create a new system:
3y=9x
Y=9x-30
Do you agree with either first step?
A-both strategies work
B-only the first strategy works
C-only the second strategy works
D-neither strategies work.
Answer:
A-both works
Step-by-step explanation:
one can simply sub into the second equation from the first step's one and remove an unknown, making it easy to solve
What is the percent increase ???? Help please
Answer:
25 percent increase
Step-by-step explanation:
im pretty sure
A house costs $18,000, which is 9/10 the cost of a car. A motorcycle costs 1/5 the cost of the car, or 4/5 the cost of 100 cards. How much is the cost of 30 cards?
PLZ PLZ PLZ PLZ PLZ HELP!!!!!!!!!!!!!
Please help me with this problem
Answer:
2/3
Step-by-step explanation:
2 / 3 x 1 = 2 /3
because you do 1x3 which gets you the bottom half then you do 2 x 1 which gets you 2 which equals 2/3
Hope this helps :) and if not I'm truly sorry
Cary is having a party and can only afford to spend no more than $40 on food. She wants to order at least 3 pizzas which cost $6 a pie, and at least 2 orders of wings that cost $8 per order. Select all the inequalities she would have to graph to determine how many pizzas and wings she could order. Let x stand for the number of pizzas and y stand for the number of wings.
y ≥ 2
x ≥ 3
3 x + 8 y ≤ 40
6 x + 8 y ≤ 40
x ≤ 3
y ≤ 2
((You can select more than one))
Answer:
A. B. and D.
Step-by-step explanation:
HELP ME ASAP PLZ !!!!!!!
Answer:
0.5 × 10^7
Step-by-step explanation:
1.6 divided by 3.2 =0.5
10 to the power or 14 minus 10 to the power of 7 = 10 to the power of 7
in division you must subtract the power number
Answer: C. 5.0 * 10^6
Step-by-step explanation:
1.6(10^14)
3.2(10^7)
=
(1.6)(100000000000000)
3.2(10^7)
=
160000000000000
3.2(10^7)
=
160000000000000
(3.2)(10000000)
=
160000000000000
32000000
=5000000 =
5*10^6
Sketch a 9 red counters and 4 yellow counters.How many zero pairs can you make?How many counters do you have after you remove the zero pairs? What do they represent
Answer:
36.75 and 1/6 ( 6 accounts equally distributed )
Step-by-step explanation:
Number of Red counters to be sketched = 9
Number of Yellow counters = 4
The number of Zero pairs that can be made = 36.75
When you remove the Zero pairs the number of counters you would have = 6 accounts ie. 1/6
What is the next number in the pattern?
1, 4, 7, 10,_
Answer:
13
Step-by-step explanation:
Throughout this pattern, each previous number is adding 3.
Hope this helps! :)
1101101+11011 in binary numbers please help
Answer:
The answer is 1000 1000
Step-by-step explanation:
In HEX, it would be 88.
In DEC, it would be 136.
In Oct, it would be 210.
Binary, how to add numbers together.
1101101
+ 11011
10001000
This is just like adding regular numbers together.
For example, when you add 88 to 55, this is what will happen
1(r)
88
+ 55
13(+1) 3
143
With binary, when 1 and 0 are added together, the result is 1. When 1 and 1 are added together, the result is 1 and 0 (1 being the "remainder", or the number that is carried over. This number is then added to the next part of the number when adding, just like in normal addition.
can someone help me with this
Answer:
The first one is 45 hours
The second is 1361
what is 111 × 111 ÷ 14
Answer:
880.071428571
Step-by-step explanation:
You could use a calculator btw but its ok happy to help :D
For the function F(x) = 1/x+1 which of these could be a value of F(x) when x is close to -1?
Answer:
Option B, -10000
Step-by-step explanation:
Step 1: Find the number that would be valid
As the x value gets closer to -1, the y values go to positive and negative infinity. Therefore, the best value out of the options given would be -10,000 since it is the closest to negative infinity.
Answer: Option B, -10000
If it costs Melissa $8.20 to make a pie, how much should she charge for a pie? Round your answer to the nearest cent if necessary.
Answer:
$16.40
Step-by-step explanation:
Which of the following relationships represents joint variation?
Answer:
y=7x
Step-by-step explanation:
that what I heard in math ok
Air Pods are on sale for 25% off. If AirPods originally cost $120, what is the sale price?
Answer:
120 /4 =30 120 - 30 = 90 The answer is 90$
Step-by-step explanation:
(–6)² – (–7)²
I need a step by step process.
John is performing an experiment in which a solution alternates between a clear color and a bluish-purple color at a regular time interval. He observes that the time interval between color changes is 30 seconds (s). Sally replicates the experiment with the same solution, but at a temperature that is 10 degrees Celsius (°C) higher. What is the most likely time interval between color changes at this higher temperature?
Answer:
15 seconds
Step-by-step explanation:
The given parameters for the experiment are;
The time it takes the solution to change from a clear color to a bluish-purple color at a given temperature = 30 seconds
The temperature at which Sally replicates the experiment with the same solution = 10°C higher than the temperature the experiment was carried out by John
Given that the process involves a change in color, which is a characteristic of a chemical reaction, and that the rate of a chemical reaction increases as the temperature of the reacting system is increased, we have time it takes for the solution to change color at a temperature increased by 10°C, will be a time lesser than 30 seconds
Answer:
B
Step-by-step explanation: