Answer:
when x = 3 1/3, y = 4.5
or
when x =3 , y = 5
Step-by-step explanation:
Here, we want to solve using substitution
xy = 15
let x = 15/y
Put this into the first equation;
3(15/y) + 2y = 19
45/y + 2y = 19
Multiply through by y
45 + 2y^2 = 19y
2y^2 -19y + 45 = 0
2y^2 - 10y - 9y + 45 = 0
2y(y-5) -9(y-5) = 0
(2y-9)(y-5) = 0
2y-9 = 0
or y-5 = 0
2y = 9 or y = 5
y = 9/2 or y = 5
y = 4.5 or y = 5
Recall;
x = 15/y
x = 15/4.5 or x = 15/5
x = 3 1/3 or x = 3
You want to purchase multiple books on sale for $6.30. The sales tax is 5% and you have $20. At most, how many books can you buy?
Answer:
3 books
Step-by-step explanation:
Assume x is the number of books you could buy.
(1+0.05)(6.3x) ≤ 20
1.05(6.3x) ≤ 20
6.615x ≤ 20
x ≤ 3.02
Answer:
the awnser is 3 books yiu can buy
Find the slope of the line that goes through (3,5) and (9,-2).
Answer:
-7/6
Step-by-step explanation:
the slope is change in y/change in x:
-2-5/9-3 = -7/6
Mark is making jackets. Mark took 2 hours to make a jacket. The jacket was made up of 50 kilograms of wool. How long do you think it will take Mark to use 500 kilograms of wool for the jackets?
Given:
Mark took 2 hours to make a jacket.
The jacket was made up of 50 kilograms of wool.
To find:
The time in which Mark use 500 kilograms of wool for the jackets.
Solution:
We have,
1 jacket take 2 hours.
Number of jackets in 50 kg of wool = 1
Number of jackets in 1 kg of wool = [tex]\dfrac{1}{50}[/tex]
Number of jackets in 500 kg of wool = [tex]\dfrac{1}{50}\times 500[/tex]
= [tex]10[/tex] Jackets
Time taken by 1 jacket = 2 hours
Time taken by 10 jacket = 20 hours
Therefore, it will take 20 hours to use 500 kilograms of wool for the jackets.
Answer:
20 hours
Step-by-step explanation:
1 jacket=50kg wool
1 jacket= 2hrs
500kg available/50kg per jacket= 10 jackets
10 jackets x 2hrs per jacket=20hrs
milk truck delivers 376 dozen gallons of milk to stores in 1 day. Write and solve an equation to find n, the number of gallons of milk the milk truck delivers in 1 day. pls help!
Answer:
376*12=n
My logic:
there are 12 items in a dozen. so 376 dozens times 12 will result in the total milk delivered in a day.
PLEASE HELP EASY MATHHH EASY 10 POINTS
Answer:
y = -x + 7
Step-by-step explanation:
owa owa
Answer:x+6y=5
4x−5+y=0
3x+y=16
Step-by-step explanation:
Have a great day! <3
¿cuantos envases se necesitan, si ponemos los 6 litros en envases de 3/4 litros?
se necesitan 8 envases
denada
What is the area of the composite shape?
Answer:
I believe it is 76 ft squared but I am not positive..
Please do number 19 for me.
Answer:
[tex]x = 9[/tex]
[tex]angle \: abc = 8x + 6x + 6x \\ 20x = 180 \\ x = \frac{180}{20} \\ x= 9[/tex]
[tex]plzz \: \: mark \: as \: brainliest[/tex]
(HELP FAST PLEASE)
Three identical cell phones weigh 18.7 ounces. What is the combined weight of two cell phones that are also identical to the three cell phones mentioned in the first sentence?
Answer:
Two of them, actually.) ... It weighs 4.87 ounces — less than a third of a pound. ... In the photo shown above, Philip Shenon, a Times reporter, sits with ... Phil and I carried the satphone from Frankfurt — it was housed in two 65-pound suitcases. ... Modern mobile satellite data units weigh a total of about three
Step-by-step explanation:
thats all i know
What property must be used when solving each step of a one variable linear equation?
add, subtract, multiply, or divide an equation by a number or an expression as long as we do the same thing to both sides of the equal sign. ...
Apply the distributive property as needed:
Isolate the variable on one side of the equation.
Step-by-step explanation:
6 mi Find the volume for the shape above. Use 3.14 for pi. Round to the nearest whole number.
Answer:
Step-by-step explanation: does anyone know? I really need this
What is the answer????please helpp
PLEASE HELP ME :(
Brain has two rectangular sheets of paper.
-The length of the larger sheet is 1 1/2 times the length of the smaller sheet.
-The width of the larger sheet is 1 3/5 times the width of the smaller sheet.
By what factor is the area of the larger sheet greater than the area of the smaller sheet?
Answer:
2.4
Step-by-step explanation:
Smaller sheet length = 10u
Smaller sheet width = 10u
Smaller sheet area = 10u * 10u = 100u^2
Larger sheet length = 1.5 * 10u = 15u
Larger sheet width = 1.6 * 10u = 16u
Larger sheet area = 16u * 15u = 240u^2
240u^2 / 100u^2 = 2.4
The factor when the area of the larger sheet greater than the area of the smaller sheet should be considered as the 2.4.
Calculation of the factor:Since
Smaller sheet length = 10u
Smaller sheet width = 10u
Now
Smaller sheet area = 10u (10u) = [tex]100u^2[/tex]
And,
Larger sheet length = 1.5 ( 10u) = 15u
And,
Larger sheet width = 1.6 (10u) = 16u
So,
Larger sheet area = 16u (15u) = [tex]240u^2[/tex]
Now
[tex]= 240u^2 \div 100u^2[/tex]
= 2.4
hence, The factor when the area of the larger sheet greater than the area of the smaller sheet should be considered as the 2.4.
Learn more about an area here; https://brainly.com/question/17870032
Simon set up his tent in his backyard last night. His tent is 6 feet tall. To secure it to the ground, he attached a rope from the top of the tent to the ground 8 feet away from the bottom of the tent as shown below. How many feet long, R, is the rope?
Length of Simon's tent = 6 feet
Distance from the bottom of the tent to the tent's base = 8 feet
Let the length of rope be R.
The tent and the rope forms a right angle triangle where the rope is the hypotenuse.
We know that :
[tex]\color{hotpink} \tt{hypotenuse}^{2} \color{plum}= {base}^{2} + {height}^{2} [/tex]
Which means :
[tex] = \tt {R}^{2} = {6}^{2} + {8}^{2} [/tex]
[tex] =\tt {R}^{2} = 36 + 64[/tex]
[tex] = \tt {R}^{2} = 100[/tex]
[tex] =\tt R = \sqrt{100} [/tex]
[tex]\hookrightarrow\color{plum}\tt \bold{R = 10 \: feet}[/tex]
Thus, the hypotenuse of this triangle = 10 feet
▪︎Therefore, the length of the rope = 10 feet
what is the answer?136,88,or 44?
Answer:
136
Step-by-step explanation:
Jack tossed a coin three times. Which tree diagram shows all the possible outcomes of the coin landing heads up or tails up?
Answer:
The top three that are first :)
Step-by-step explanation:
I NEED HELP PLZ MY SMART PPL
Answer:
its 60
Step-by-step explanation:
if its right caan i get a brainliest
Answer:
60
Step-by-step explanation:
To get the area of a right triangle (a triangle with an angle of 90 [represented by the box in the corner]) you have the formula of
Area = (a*b) divided by 2
a = one side of the triangle
b = another side of the triangle
Neither side are the hypotenuse.
What is the range of the data set below?
25, 24, 24, 24, 33
Answer:
9
Step-by-step explanation:
the range is the difference between the greatest value and the smallest one. The greatest value in the data set is 33, and the smallest is 24.
So u just subtract 24 from 33:
33 – 24 = 9
and that's your range! hope this helps!
what is 1+1= ? and how do you do it? also what is the pendas mean?
Answer:
2, PEMDAS means parentheses, exponents, multiplication, division, addition, and subtraction.
Step-by-step explanation:
Can someone help please??
If 3x−y=12, what is the value of
8x/2y ?
A) 2 to the 12th power
B) 4 to the 4th power
C) 8 to the 2nd power
D) The value cannot be determined from the information given.
Answer:
A) 2 to the 12th power
Step-by-step explanation:
[tex] \frac{8x}{2y} = \: \frac{ {2}^{3x} }{2y} = {2}^{12} [/tex]
10 points !!
Which expression is equivalent to this polynomial x^2+12
Answer:
expand x^2+12 --> results in ASimplify the expression using properties of operations.
18t−3−5t+8
Answer:
13t+5
Step-by-step explanation:
Im a bit stuck on this problem
Answer:
f I I tough luck if it's if I've if it's if you've paid down let of us if just it ubos skits enough of others
Step-by-step explanation:
digital shall will also sorry soap sorry s goo form enough wish all so do all kelan kaso kaka kalakalorry root sorry for
4
What is the result of 2-10?
.
1
5
Answer:
-3.14530027393739338363829263839
-Step-by-step explanation:
After a 60% reduction, you purchase a new sofa drink machine on sale for $312.
What was the original price of the sofa drink machne?
Please help
How can you describe the graph of the equation y= mx + b? Explain
Answer:
mx is the slope. b is the y-intercept
Step-by-step explanation:
the first thing you should always do is identify your slope this is key for graphing. remember your slope is b so what ever b is you locate that point in the x axis.
then whatever your slope is remember that it is rise over run so say your equation is y=3x+5 you plot the point on the y intercept which is 5. now 3x is your slope so you put it as a fraction to make it easier this is what it looks like in a fraction "3/1" so you go up 3 on the graph and over 1 because of rise/run
Please I Need Help
I'm stuck on this question ⁉️
Answer:
greater than
Step-by-step explanation:
Please forgive me if wrong
Pleaseee I need help it’s a major grade
Answer: D.
Step-by-step explanation:
48/2.15= d, so 2.15d=48
HELO PLS DUE IN 40 MINS
In the diagram below, it is given that point Ris the midpoint of PQ. Which of the following can be concluded
based on this given?
Answer:
Sheesh good luck
Step-by-step explanation:
.........
Answer:
3
Step-by-step explanation:
MN is not equal to NR, because MN is too long
It doesn't tell us R is the midpoint of MN, so for all we know MR and RN are completely different measurements.
PR and QR must be equivalent if R is the midpoint of the two.
Which angle is an exterior angle?
Answer:
I presume that i° would be the exterior angle for this question.
Step-by-step explanation: