Substitution algebra
Please answer fast :) Don't answer this with troll stuff plz, I don't have much points
Answers
We will use substitution to solve the system. Step 1 is partially complete.
[tex]y = -2x - 9\\6x - 5y = -19\\\\6x - 5(-2x - 9) = -19\\\\6x + 10x + 45 = -19\\\\16x + 45 = -19\\\\16x = -64\\\\x = -4[/tex]
We will now use what we got for x to solve for y in one of the original equations.
[tex]6(-4) - 5y = -19\\\\-24 - 5y = -19\\\\-5y = 5\\\\y = -1[/tex]
The solution is (-4, -1).
Related Questions
if one leg of a right triangle is 12 and the other leg is 16, what is the length of the hypotenuse in this right triangle?
Answers
Answer:
20
Step-by-step explanation:
Since I am given two values of the triangle, I will input the equation a²+b²=c².
"c" represents the hypotenuse. First I plug in the values of the legs, 12²+16²=c². Next I simplify these values to 144+256=c², which is 400=c². Finally I take the square root from both the value and the variable: √400=√c² which is equivalent to 20=c. Therefore, the hypotenuse is 20. Hopefully this helps :)
Another name for 3/3 is
OA) 0
OB) 3
OC) 1
Answers
Solve for x. 4x^2 – 2x + 3 = 0
Answers
Answer:
[tex]x=\frac{1\pm i\sqrt{11}}{4}[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Standard Form: ax² + bx + c = 0Quadratic Formula: [tex]x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}[/tex]Algebra II
Imaginary Roots: √-1 = iStep-by-step explanation:
Step 1: Define Equation
4x² - 2x + 3 = 0
Step 2: Identify Variables
a = 4
b = -2
c = 3
Step 3: Solve for x
Substitute [Quad Formula]: [tex]x=\frac{2\pm\sqrt{(-2)^2-4(4)(3)} }{2(4)}[/tex]Evaluate Exponents: [tex]x=\frac{2\pm\sqrt{4-4(4)(3)} }{2(4)}[/tex]Evaluate Multiplication: [tex]x=\frac{2\pm\sqrt{4-48} }{8}[/tex]Evaluate Subtraction: [tex]x=\frac{2\pm\sqrt{-44} }{8}[/tex]Factor Radical: [tex]x=\frac{2\pm\sqrt{-1} \sqrt{44} }{8}[/tex]Simplify Radicals: [tex]x=\frac{2\pm 2i\sqrt{11} }{8}[/tex]Factor Numerator GCF: [tex]x=\frac{2(1\pm i\sqrt{11}) }{8}[/tex]Simplify: [tex]x=\frac{1\pm i\sqrt{11}}{4}[/tex]determine the force of gravitational attractions between the Earth 5.98 x 10^24 kg and a 70kg boy is standing at sea level, a distance og 6.38 x 10^6m Earth's center ( the universal gravitational constant (G) = 6.6726 x 10 ( raise to power) 11 N/m/kg^ 2)
Answers
Answer:
6.862035456*10^26 m/s^2
Step-by-step explanation:
We know that:
m=70kg
M=Mass of earth=5.98*10^24kg
R=Distance between object's and earth's center=6.38*10^6m
G=6.6726*10^-11 N/m/kg^2
Thus, we can use the equation [tex]F_g=\frac{GmM}{R^2}\\[/tex]:
[tex]F_g=\frac{(6.6726*10^-11)(70)(5.98*10^{24})}{(6.38*10^{-6})^2}\\\\F_g=6.862035456*10^{26}[/tex]
This means the force of gravitational attractions is 6.862035456*10^26 m/s^2
Pls help i need to fnsh
Answers
Answer:
(1,0)
Step-by-step explanation:
Step-by-step explanation:
Are you here??..........
If X=sin 130° + cos 130° then
1)X<0 2)X=0 3)X>0 4)X greater than or equal to 0
Answers
Answer:
hy are u indian ?
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1) Avery also tracks the number of minutes a player
plays and the number of points the player scored.
Describe the association between the two data sets.
Tell what the association suggests.
Points Score
Answers
Answer:
the amount of players should determine the amount of points scored within the game, so the more points scored the more players there should be.
Step-by-step explanation:
$5 is what percent of $5?
Answers
Answer:
$5 is 100% of $5.
Answer:
$5 is 100% of $5
Step-by-step explanation:
Putting this into fraction format, it would be 5/5 = 1 . if that fraction turned out to be less than 1, whatever the number was that would be the percent. But this came out as 1 therefore saying that $5 is 100% of $5
pls, help hurry! a⁴-9
and explain pls
Answers
Answer:
[tex] {a}^{4} - 9 \\ = {a}^{ {2}^{2} } - {3}^{2} \\ let \: {a}^{2} \: be \: y \\ = {y}^{2} - {3}^{2} \\ from \: difference \: of \: squares \\ = (y - 3)(y + 3) \\ substitute \: for \: y \\ = ( {a}^{2} - 3)( {a}^{2} + 3)[/tex]
Answer:
100 POINTS! (50 split up) PLSSSSSSSSSS HELP!!! I REALLY NEED IT SO MUCH :( I PROMICE2 g. Describe your results in terms of precision and accuracy. Explain your answer in a paragraph for the best grade.
Step-by-step explanation:
Look at the photo pick A B C D either one explanation not needed thank you! <3
Answers
Answer:
A?
Step-by-step explanation:
PLEASE ANSWER FAST
On 1 September, Leila starts to go swimming every day.
She swims 30 lengths of the swimming pool every day. The swimming pool is 20m long.
Work out the date when Leila has swum a total of 10 km.
Answers
Answer:
22 November
Step-by-step explanation:
First we have to find the total length she swims in 1 day
= 2(length of the swimming pool) x no. of lengths she swims in 1 day
=2x30x20
=120m she covers in 1 day
10km = 10,000m
no of days= total distance/ distance she covers in 1 day
=10000/120
=83.3 days
WILL GIVE BRAINLIEST!!! Which equation is modeled below? 4 x tiles and 2 negative 1 tiles = 2 x tiles and 4 1 tiles. 2 x + (negative 2) = negative 2 x + 6 4 x + (negative 2) = negative 2 x + 6 2 x + 4 = 6 x + 2 Negative 2 x + 4 = 6 x + (negative 2)
Answers
Answer:
B
Step-by-step explanation:
4x+ (-2) =-2x+6
just took the quiz
Answer:
B) 4 x + (-2) = -2 x + 6
Step-by-step explanation:
what is the simplified form of 4x - 7 + x - 10
Answers
Answer:5x-17
Step-by-step explanation:
4x - 7 + x -10 = 0
4x + x - 7 - 10 = 0
5x - 17 = 0
5x = 17
x = 17/5
Colton is taking a long bike ride where he rides at a constant speed. The distance he bikes is proportional to the amount of time he has been biking. After 3.5 hours, he has traveled a distance of 49 miles.(b) Colton travels at the same rate as in (a) for 6 hours. Let d be the distance he biked. Set up and solve a proportion for d. (c) Colton would like to bike 200 miles. Let h be the number of hours it will take Colton to bike this distance. Solve a proportion for h. Round to the nearest tenth of an hour.
Answers
Answer:
b) [tex]d[/tex] = 84 miles
c) [tex]h[/tex] = 14.3 hours
Step-by-step explanation:
Given that:
The speed of Colton is constant while riding a bike.
Formula for speed is given as:
[tex]Speed = \dfrac{Distance}{Time}[/tex]
If speed is constant, then we can deduct that:
[tex]Distance \propto Time[/tex]
Time = 3.5 hours
Distance = 49 miles
Therefore, the speed will be equal to:
Speed = [tex]\frac{49}{3.5}[/tex] = 14 miles/hr
b) Given that:
Time = 6 hours, then we have to find the distance to be hiked if the speed is same.
[tex]14 = \dfrac{d}{6}\\\Rightarrow d = \bold{84}\ miles/hr[/tex]
c) Given that:
Distance = 200 miles
Number of hours = [tex]h[/tex]
To find, the value of [tex]h[/tex].
[tex]14 = \dfrac{200}{h}\\\Rightarrow h = \dfrac{200}{14}\\\Rightarrow h = \bold{14.3}\ hours[/tex]
I NEED to answer this correctly. Can I get some help?
Answers
Answer:
C., F.
Step-by-step explanation:
Vertices in the same position are congruent angles.
There are 3 pairs of congruent angles:
<T, <W
<U, <X
<V, <Y
There are 3 pairs of congruent sides:
TU, WX
UV, XY
TV, WY
Now pick the correct statements from the list:
C., F.
Ten percent of 640 is what number?
64
128
160
320
Answers
Answer: 64
Step-by-step explanation:
Answer:
64
Step-by-step explanation:
Ten percent of 64 is the same as;
0.1 * 640
= 64
Help PLEASE ASAP, Algebra question, need steps
Answers
Answer: x=2
Step-by-step explanation: I download and I see your work and that my answer up there, hope this help
A square has a perimeter of 36 millimeters.
What is the area of the square?
Answers
Answer:
A=81
Step-by-step explanation:
Answer:
81
Step-by-step explanation:
36/4=9
9*9=81
Anybody know the answers to this
Answers
Answer:
no sorry
Step-by-step explanation:
2) A big league pitching coach tries to limit his pitchers to 110
pitches per game. If the pitcher has already thrown 52
pitches, write and solve an inequality to find how many more
pitches he can throw before reaching the limit.
Answers
Which set of numbers forms a Pythagorean triple?
1, 2 , 4
6, 7 , 13
3 ,4 , 5
8, 15 , 20
Answers
Answer:
3, 4, 5
Step-by-step explanation:
3 ^2 = 9
4 ^2 = 16
5 ^2 = 25
9 + 16 = 25
nika is making cakes for a bake sale at school when she realizes she is running out of milk, each cake requires 1/4 cups of milk. nika has 3 3/4 cups of milk how many cups can she make
Answers
Answer:
Nika can make 15 cups of milk.
Step-by-step explanation:
To find how many cups she can make, we divide 3 3/4 by 1/4. First, we convert 3 3/4 to an improper fraction.
3 ¾ / ¼ Equation
15/4 / ¼ Convert to improper
15/4 * 4/1 Reverse sign & second fraction
= 60/4
= 15
Also, 15 * 1/4 = 3 ¾, so its correct!
you are flying a kite and want to know its angle of elevation. the string on the kite is 39 meters long and the kite is level with the top of a building that you know is 24 meters high. an inverse trigonometric function to find the angle of elevation of the kite. PLEASE HELP WITH THIS GUYS!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
15 metters
Step-by-step explanation:
hope this helps you.
what is 281.4/10*0?
No steps needed just answer
Answers
Answer:
0
Step-by-step explanation:
Answer:
0
Step-by-step explanation:
ignore the answer chosen but does anyone know the answer to this pls asap!!
Answers
Answer:
The diagonals bisect each other
Step-by-step explanation:
2s = 10 s+5 = 10 FJ = JH
t+12 = 18 3t = 18 EJ = JG
look at the circumference of each of the circles below. what do you think would be the circumference of a circle with diameter 1 cm?
Answers
Step-by-step explanation:
[tex]circumference \: of \: the \: circle = 2\pi \times \frac{diameter}{2} \\= 2\pi \times radius = 2 \times \pi \times \frac{1}{2} = \pi = 3.14 \: cm[/tex]
Eric rented a truck for one day the base fee was 16.95 for additional charge of .76 cents for each mile driven eric had to pay 152.23 when he returned the truck how many miles did he drive
Answers
Answer:
178 miles
Step-by-step explanation:
Let Eric has driven d miles.
As the rate of charge of driving the truck = 76 cents /mile
So, the charge of driving the truck for d miles = 76d cents= $0.76d
The base fee of the truck was $16.95.
Total money paid at the time of returning the truck = $152.23
So, 16.95+0.76d=152.23
0.76d= 152.23-16.95=135.28
d=135.28/0.76
d=178
Hence, he drives 178 miles.
Last year my sisters closet lost $10,458 this year the company has lost $3,250 find the tow-year loss for the company
Answers
Answer:
$13,708 dollars lost total
Step-by-step explanation:
10458+3250=13708
A scientist uses a submarine to study ocean life she begins at C level which is at an elevation of 0 feet then she travel straight down for 90 seconds at a speed of 3.5 ft./s then she then travels directly up for 30 seconds how do you speed of 2.2 ft./s after this 120 seconds period how much time in seconds will it take for the sciences to travel back to see if level at the submarines maximum speed of 4.8 ft./s
Answers
9514 1404 393
Answer:
10.625 seconds
Step-by-step explanation:
distance = speed · time
We want the total of all distances to be zero.
(-3.5)(90) +(2.2)(120) +(4.8)t = 0
-315 +264 +4.8t = 0 . . . . . simplify
-51 +4.8t = 0 . . . . . . . . . . . simplify more
-10.625 +t = 0 . . . . . . . . . .divide by 4.8
t = 10.625 . . . . . . . . . . . . . add 10.625
It will take the scientist 10.625 seconds to reach sea level.
What’s da answerrr ?..
Answers
Answer:
It is half as much. urysukdhwjx8hdjdhvndkduc