Answer:
Step-by-step explanation:
hello :
r+b=7... (*)
3.75r+2.75b=22.25.... (**)
use (*) : r = 7 - b
put this value in (**) :
3.75(7 - b)+2.75b = 22.25
26.25 -375b +2.75b = 22.5
-375b +2.75b = 22.5 - 26.25
- b = -3.75
so : b = 3.75
but : r = 7 - b
r = 7 - 3.75
r = 3.25
A person swims 11 miles downstream in the same time they can swim 7 miles up stream. The speed of the current is 4 miles per hour.
These situations can be represented by the equations
Downstream: t=11/s+4 Upstream:t=7/s-4,
where t stands for time and s is the speed of the swimmer. What is the speed of the swimmer swimming in still water?
Answer:
s = 18 mph
Step-by-step explanation:
At downstream, time is; t = 11/(s+ 4)
At upstream, time is; t = 7/(s - 4)
Since they both are passed in the same time, then ;
11/(s+ 4) = 7/(s - 4)
Cross Multiply to get;
11(s - 4) = 7(s + 4)
11s - 44 = 7s + 28
11s - 7s = 44 + 28
4s = 72
s = 72/4
s = 18
what is 3^ 81^5=3^ please
Answer:
Step-by-step explanation:
Find the perimeter of the figure. (Will mark brainliest of correct!)
Answer:
24 inches.
Step-by-step explanation:
Add em' all up cuz.
Answer:
It should be 30 I think
Step-by-step explanation:
I first found the perimeter of the rectangle and then the triangle and added them both together
the ravens scored 1 touchdown and an extra point . how many total points did they score
Simplify. 9 - 5x + 8 - 4x
Answer:
− 9 + 1 7
Step-by-step explanation:
Hope this helps!
GIVING BRAINLIEST!!!!!!
32+4X(16 x 1/2)-2
show your work
Answer:
32x + 30
Step-by-step explanation:
32+4X(16 x 1/2)-2
32 + 4X x 8 -2 ( 16 times 1/2 = 8)
32 + 32x -2 ( 4 times 8 = 32)
32x + 30 ( 32 + -2 = 30)
20+(5 * 2/5)+3
20 + 2 + 3
22 + 3
25
If it is -31°F in one city and in another city it is
83°, what is the temperature difference
between the two cities?
Answer:
52 degrees apart
Step-by-step explanation:
Mhanifa please help i will mark brainliest :)
Answer:
AD=11.7 since corresponding side of parallelogram are equal.
BD=8.5 since corresponding side of parallelogram are equal.
Answer:
#1
Opposite sides are congruentAD = BC = 11.7 units#2
Diagonals bisect each otherBD = BE + DE = 2*DE = 2*7.2 = 14.4 unitsMath hey guys can somebody please help me out here
the answer would be C
braineliest ;)
How do I find X and Y
Answer:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(3,5)
Equation Form:
x=3,y=5
Step-by-step explanation:
Identify a transformation of the function f(x) = (x) by observing the equation of the function g(x) = (x)+56.
A: a vertical shift 56 units upwards
B: a horizontal shift 56 units to the left
C: a horizontal shift 56 units to the right
D: a vertical shift 56 units downward
Answer:
A: a vertical shift 56 units upward I believe
help pleaseeee, I don't understand
Answer:
B.
Step-by-step explanation:
2x+4-1
Consider the function f(x)=15x^2+60x-19
Name the vertex for the function
The vertex for this function would be (-2,-79)
What is the surface area of the cylinder with height 4 mi and radius 3 mi? Round your answer to the nearest thousandth.
Answer:
The surface area of the cylinder will be "131.88".
Step-by-step explanation:
The given values are:
Height of cylinder,
h = 4 m
Radius of cylinder,
r = 3 m
As we know,
The surface are of cylinder is:
⇒ [tex]A_s=2 \pi r(h+r)[/tex]
On substituting the values, we get
⇒ [tex]=2\times 3.14\times 3(4+3)[/tex]
⇒ [tex]=18.84\times 7[/tex]
⇒ [tex]=131.88[/tex]
Complete the system of linear equations so that there are infinitely many solutions.
Y= -3/5x + 2
blank x+ blank y=20
PLEASE HELPPPPPPP WILL GIVE BRAINLIEST
Answer:
y-intercept:
(0,2) or just -3/5
Step-by-step explanation:
Answer:
3x + 5y = 2
Step-by-step explanation:
y = -3/5 x + 2
multiply both sides by 5
5y = -3x + 2
add 3x to both sides
3x + 5y = 2
note: if it really has to be equal to 20, then multiply both sides by 10, which will result in 30x + 50y = 20
What is the area of the figure below?
3 in.
3 in.
5 in.
5 in.
3 in.
3 in.
7 in.
Answer:
68 inches squared
Step-by-step explanation:
First, let's find the area of the squares at the top and bottom. Area for a square is:
L * W = A
Plug in the values...
3 * 3 = 9
Therefore, the area of the two squares combined is 18 inches (since 9 + 9 = 18). Now, the hexagon in the middle, which is the hardest part. We will have to separate it into 4 triangles and a rectangle, for simplification. We need to find the base widths of the triangles, which are:
7 (total width) - 3 (middle width) / 2 (because there are two sides)
So it is:
(7 - 3)/2
4/2 = 2
So, the base of the triangle is two inches. We also know that the height of the triangle is five inches. The formula for the area of a triangle is:
(B * H)/2 = A
Fill it in...
(2 * 5)/2
10/2 = 5 inches
So, the area of each triangle is 5 inches. Since there are four triangles, we need to do:
5 * 4 = 20 inches
That means that all of the triangles combined is 20 inches. Lastly, we need the middle part of our hexagon. It is 10 inches tall, and three inches wide. So...
L * W = A
10 * 3 = 30
So, that means that the area of the hexagon is:
30 + 20 = 50
Plus, the two squares from the beginning:
50 + 18 = 68 inches squared
Therefore, the area of the figure is 68 inches. Hope this helps you!
solve for x. round your answer to the nearest tenth
Trigonometry
Answer:
[tex]\displaystyle x \approx 11.1[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityTrigonometry
[Right Triangles Only] SOHCAHTOA[Right Triangles Only] cosθ = adjacent over hypotenuseStep-by-step explanation:
Step 1: Define
Angle θ = 42°
Adjacent Leg = x
Hypotenuse = 15
Step 2: Solve for x
Substitute in variables [cosine]: [tex]\displaystyle cos42^\circ = \frac{x}{15}[/tex][Multiplication Property of Equality] Isolate x: [tex]\displaystyle 15cos42^\circ = x[/tex]Rewrite: [tex]\displaystyle x = 15cos42^\circ[/tex]Evaluate: [tex]\displaystyle x = 11.1472[/tex]Round: [tex]\displaystyle x \approx 11.1[/tex]According to market research, a business has a 75% chance of making money in the first 3 years.
According to lab testing, of a certain kind of experimental light bulb will work after 3 years.
According to experts, the likelihood of a car needing major repairs in the first 3 years is 0.7.
Write the scenarios in order of likelihood from least to greatest after three years: the business makes money, the light bulb still works, and the car needs major repairs.
1 car 2 businse 3 lightball
Name another chance experiment that has the same likelihood as one of the scenarios.
plese answer right this is my 3rd time and all i got was like ghty0................................... for answers
Answer:
There is a 75% chance of sunny skies tomorrow.
Step-by-step explanation:
75% chance is the same likelihood as the business scenario. Hope this helps!
Help worth 10 points I need the whole area of the shape
Answer:
1,736km^2
Step-by-step explanation:
Answer:
2,352 km^2
Step-by-step explanation:
So there is a square and 4 triangles.
You first, find the area of the square.
You then get: 35 x 48 = 1,680
Then you need to add the triangles.
Because we have 2 triangles on each side the area formula of a triangle in which is 1/2 times by the base and height can be solved by just B * H.
Doing that you can get: 48 * 7 = 336
Because you have 2 triangles, the final area results in:
1,680 + 336 * 2 = 2,352
I GOT A FAKE ANSWER ON THE LAST ONE SO PLEASE HELP FOR REAL NOT FOR THE POINTS
This is your chance to demonstrate your basketball skills! You have been chosen to participate in a paper-ball throwing contest.
Directions:
1. Use the scrap paper to make 10 paper balls per group. (Wad the paper balls up tightly so they are easier to aim.)
2. Place a trash can (or other large container) 5 feet away.
3. Predict how many paper balls you will be able to get into the basket. Type your prediction.
4. Type your results as a fraction.
5. Type your results as a decimal.
Answer: 3/5 or 0.6
Step-by-step explanation: It would take 2 shots for me to fine tune the force I need to get a perfect shot. If you divide 3 by 5 you get 0.6.
Select the best answer 101
2. Which of the following is an example of a proper fraction?
A.7/6
B. 4/3
C.4/4
D.3/4
12) Amusement Parks A thrill ride at an amusement park carries riders 160 feet straight up and then releases them for a free fall. The time t in seconds that it takes an object in free fall to reach the ground is t =
[tex] \sqrt{ \frac{d}{16} } [/tex]
where d is the distance in feet that it falls. How long does it take the riders to reach the ground? Give your answer as a radical expression in simplest form. Then estimate the answer to the nearest tenth of a second.
Answer:
sqrt(10)
Step-by-step explanation:
sqrt(160)/16
sqrt(16)sqrt(10)/sqrt(16)
4sqrt(10)/4
sqrt(10)
I need answer by 2:25!!!! Please hurry!!!!!
x=-2, y=5, z=3.
X^4-5y+2(x-z)^2.
A. 50.
B. -41.
C.41.
D. 63
Answer:
C
Step-by-step explanation:
-2^4-5(5)+2(-2-3)^2
16-25+2(25)
16-25+50
41
How many sides does a polygon have?
Answer:
it can have any about 3 and up as long as it is a 2d shape and it has to have straight lines
Answer:
They all vary. All a polygon needs is straight sides, two dimensions, and equal length sides.
Step-by-step explanation:
Hope this helps!
help please I need it in polynomial forms
No links or trolls please. I need help with this math, it’s due soon. Thanks you. It’s a division sign by the way, it’s hard to see in the photo.
Answer:
n^2p
Step-by-step explanation:
Thats the answer
Functions and Graphing complete each table
Answer:
table 1: -4,0,4,8. table 2: -3,-1,1,3 table 3: 1/3,0,-1/3,-2/6
Step-by-step explanation:
there were 7 roses in the vase. Jessica cut some more roses from her flower garden. there are now 15 roses in the vase. how many roses did she cut?
Answer:
Jessica cut 8 roses.
Step-by-step explanation:
15-7=8
You have to subtract the amount she cut from the flower garden (15) to the amount which the vase had (7), in which you will get an answer of 8.
Ann's car can go 204 miles on 6 gallons of gas. During a drive last weekend, Ann used 7 gallons of gas. How far did she drive? Use pencil and paper. Explain how the problem changes if you were given the distance Ann drove last weekend instead of how much gas she used.
Given :
Writing lan's car can go 204 miles on 6 gallons of gas.
During a drive last weekend, lan used
7 gallons of gas.
To find :-
How far did he drive?
Solution :-
According to Question ,
Car can go 204 mi on 6 gallons of gas.
Using Unitary Method ,
On 1 gallon of gas it will go 204/6 mi
On 7 , it will go 204/6*7 =238 miles
Hence the required answer is 238 miles.
The figure shown is created by joining two rectangles.
1.25 ft
2.25 ft
3.5 ft
2 ft
3.5 ft
Enter the area, in square feet, of the figure.