Answer:
Speed of plane in still air: 490 mile/hour
speed of wind: 70 mile/hour
Step-by-step explanation:
still speed = x wind speed = w
with wind: speed = still + wind
(x+w) * 3 = 1680 ...a
against wind: speed = still - wind
(x-w) * 4 = 1680 ...b
b-a ... 4x-4w-3x-3w = 0
x-7w = 0
x = 7w
substitution: (7w+w)*3 = 1680 8w = 560 wind speed (w) = 70
still speed (x) = 7w = 490 mile/hour
Naomi's square bedroom has an area of 90 square feet. What is the length of one of the walls? Round to the nearest tenth if necessary.
Answer:
9.48 ft
Step-by-step explanation:
Step one:
given data
Naomi's square bedroom has an area of 90 square feet
Area of the room = 90 ft^2
Required
the length of the side of the room
Step two:
we know that area is
A= L^2
substitute
90= L^2
L= √90
L=9.48 ft
Round 19.65 to the nearest whole number.
Answer:
20
Step-by-step explanation:
Any number with a decimal of .50 is rounded up. Anything less is rounded down.
So, 19.65 is rounded up to 20.
In order to solve the equation 9x = -3 (2+ 3y) for y a student simplifies the equation as shown
Step 1: 9x = –3x + -3 (Gy)
Step 2: 9x = -3x + - y
Step 3: 92
Step 4: 6x = -Y
Step 5: Y = -6
3x = -Y
Which statement describes the error the student made in simplifying the equation?
find the measure of angle 1
(simplify your answer. type an integer or a decimal)
Answer:
<1=117°
Step-by-step explanation:
The sum of two opposite interior angles equals one exterior angle.
<1=58+59=117°
An architect uses a cylindrical container to protect her blueprints. The dimensions of the cylinder are shown in the diagram. 3 in. 15 in. Which measurement is closest to the total surface area of the container in square inches?
Jack and Marci’s restaurant bill was $50. They usually leave an 18% gratuity, but because they received exceptional service, they decided to leave a larger tip instead. Slide the bar on the interactive tool to increase the amount of the tip. What percent of the bill would an $11 tip be? What percent of the bill would a $12.50 tip be?
Answer:
What percent of the bill would an $11 tip be?: 22%
What percent of the bill would a $12.50 tip be? 25%
Step-by-step explanation:
Edegunity
Answer:
1. 22%
2. 25%
Step-by-step explanation:
edginuity
if the dice is rolled 600 times, about how many 6s would you expect to get
Step-by-step explanation:
whis this is your answer
The number of times getting 6's, when the dice is rolled 600 times is 100.
What is the probability?Probability can be defined as the ratio of the number of favourable outcomes to the total number of outcomes of an event.
We know that, probability of an event = Number of favourable outcomes/Total number of outcomes
Given that, the dice is rolled 600 times.
If you roll a fair, 6-sided die, there is an equal probability that the die will land on any given side. That probability is 1/6. This means that if you roll the die 600 times, each face would be expected to appear 100 times.
Therefore, number of times getting 6's, when the dice is rolled 600 times is 100.
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Please help and number the questions
Giving 50 points please solve it
And I won’t report
Answer:
1. 18.84 in
2. 56.52 cm
3. 4.71 ft
4. 25.12 m
5. 37.68 ft
6. 12.56 yd
7. 43.96 in
8. 28.26 cm
9. 7.85 m
Step-by-step explanation:
[tex]C=2\pi r[/tex]
1 Four sets of ordered pairs are shown below.
a. {(2, -4), (-3, -5), (-3, 3), (-2, 6)}
b. {(5,2), (3, 2), (-1, 2), (3,4)}
C. {(-6, -4), (3, -4), (-2,-4), (5, -4)}
d. {(3, 2), (-3, -2), (3, 6), (8, 2)}
Which set(s) of ordered pairs do NOT represent a function?
A a only
B a and c only
C a, b, and d only
D All of the above
Answer:
c
Step-by-step explanation:
its a, b, and d because these have inputs with different outputs
ex. (-3,-5) and (-3,3)
Answer:
The answer is C. a, b, and d only.
Step-by-step explanation:
A is not a function because -3 has two y like, (-3,-5) and (-3,-3).
B is not a function because like A, it has an x that has more than one y value, like (3,2) and (3,4)
C is a function because all the x values only have one y value, even though there are many x values that contain the same y value but to be a function the x value must not repeat (only if the y value is the same) or have multiple y values for the same x value.
D is not the function because the x value 3 has two different y values, (3,2) and (3,6)
An astronaut drops a rock off the edge of a cliff on the moon. The distance d(t), in meters, the rock travels after t seconds can modeled by the function d(t)= .5x^2. What is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped
Answer:
The average speed is 7.5 [tex]\frac{ m}{ s}[/tex]
Step-by-step explanation:
Speed is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it.
Then, the average speed relates the change in position to the time taken to effect that change:
[tex]speed=\frac{change in position}{change in time}[/tex]
The change in position is the difference between the final position and the initial position, while the change in time is the difference between the final and initial time.
In this case, the starting and ending positions are calculated by replacing the times in the function of the distance d (t):
d(5)= 0.5*5²= 12.5 m
d(10)= 0.5*10²= 50 m
So:
change in position= final position - initial position= 50 m - 12.5 m= 37.5 mchange in time= 10 s - 5 s= 5 sReplacing in the definition of speed:
[tex]speed=\frac{37.5 m}{5 s}[/tex]
and solving you get:
speed= 7.5 [tex]\frac{ m}{ s}[/tex]
The average speed is 7.5 [tex]\frac{ m}{ s}[/tex]
There are 2214 bacteria in a petri dish at the beginning of an experiment. The number of bacteria doubles every 3 hours. How many bacteria will there be after 2 days? Your answer: 145,096,704 95,305,440,290 8856 19926
Answer:
1)145,096,704
Step-by-step explanation:
24*2=48
48/3=16
1.2214*2=4428
2.*2=8856
3.*2=17712
4.*2=35424
5.*2=70848
6.*2=141696
7.*2=283392
8.*2=566784
9.*2=1133568
10.*2=2267136
11.*2=4534272
12.*2=9068544
13.*2=18137088
14.*2=36274176
15.*2=72548352
16.*2=145096704
Help me I need an answer
Which equation represents a line with a slope of 1⁄2 passing through
the point (6, 4)? please answer ASAP. will give brainiest with explanation
Answer:
is -4=Y
Step-by-step explanation:
i had that problem
Here are two similar rectangles find the area of the largest one
Answer:
40.32 cm²
Step-by-step explanation:
The area of the small rectangle = 7 × 4 = 28 cm²
Given the ratio of the sides of similar rectangles = a : b , then
the ratio of the areas = a² : b²
Here ratio of sides = 4 : 4.8 = 1 : 1.2
ratio of areas = 1² : 1.2² = 1 : 1.44
Let x be the area of the larger rectangle then by proportion
[tex]\frac{1}{28}[/tex] = [tex]\frac{1.44}{x}[/tex] ( cross- multiply )
x = 40.32
Area of larger rectangle is 40.32 cm²
Answer:
do it yourself loser
Step-by-step explanation:
loser
41 euros to 85 euros find the percent
Answer:
Step-by-step explanation:
1.21 United States Dollar
PLEASEE HELPP!!!! ASAPP PLEASE PLEASEE!!!
On a coordinate plane, point E is (negative 6, 8), point A is (5, 7), point B is (10, negative 2), point C is (8, negative 6), point D is negative 6, negative 6).
Which statements are true? Select all that apply
The length of side ED is equal to the length of side DC.
The length of side EA is equal to the length of side AB.
You can find the length of side BC by counting.
Shape ABCDE is a pentagon.
Shape ABCDE is a hexagon.
Answer:
two are correct: side ED is equal to DC, and ABCDE is a pentagon
Step-by-step explanation:
pentagon is a polygon having 5 sides
You can find the length of BC by using the distance formula
Answer:
a, d to make it simpler
Step-by-step explanation:
In your own words, define the conic section you chose as a collection of points (loci) on a plane.
The conic section as a collection of points(loci) on a plane can be defined in this way .
What is conic section?A conic section is a curve obtained by intersecting a cone with a plane. In Algebra , There are four main types of conic sections:
circles, parabolas, ellipses and hyperbolas. Each of these conic sections has different characteristics and formulas that help us solve various types of problems.
What is loci?A locus (plural: loci) (Latin word for "place", "location") is a set of all points (commonly, a line, a line segment, a curve or a surface), whose location satisfies or is determined by one or more specified conditions.
According to the question
There are 4 main types of Conic section :
circles, parabolas, ellipses and hyperbolas. Each of these conic sections has different characteristics and formulas
Loci for circle : The locus of a circle is defined as a set of points on a plane at the same distance from the center point.
Loci for parabola : A parabola is a locus of points that are equidistance form a focus and a directrix .
Loci for hyperbola: A hyperbola is the locus of points such that the absolute value of the difference between the distances from to and to is a constant.
Loci for ellipse: An ellipse is the locus of all those points in a plane such that the sum of their distances from two fixed points in the plane, is constant. The fixed points are known as the foci (singular focus), which are surrounded by the curve.
Hence, The conic section as a collection of points(loci) on a plane can be defined in this way .
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Solve the inequality. Check your solution. x+5 is greater than or equal to 10
Answer:
not too sure about it
Step-by-step explanation:
x+5>=10
x>=10-5(collecting like terms)
x>=5☺️
Select the correct solution for 12x = 60.
O A. x = }
B. X = 5
C. X = 48
O D. x = 72
Answer:
B.5
Step-by-step explanation:
5*12=60
For what Value of X is ABC~ DEF?
Answer:
The answer to the question is A
A chef is going to use a mixture of two brands of Italian dressing the first brand contains contains 7% vinegar and the second brain contains 12% vinegar the chef wants to make 220 mL of dressing that is 11% vinegar how much of each branch should he said he use
Answer:
176 of 12% vinegar
44 of 7% vinegar
Step-by-step explanation:
Percentage vinegar required = 11%
Volume = 220 mL
First brand % = 7%
Second brand % = 12%
Let p = volume of 12% vinegar material
Mixture :
0.12p + 0.07(220 - p) = 220 * 0.11
0.12p + 15.4 - 0.07p = 24.2
0.05p = 8.8
p = 8.8 / 0.05
p = 176
176 of 12% vinegar and
220 - 176 = 44
44 of 7% vinegar
Jeremy spent the entire weekend earning money by working around his neighborhood 15% of his total earnings was from raking leaves and $36 mowing lawns and earn the rest of his money walking dogs the end of the weekend with earning $90 how much money did he earn by walking dogs?
Answer: $40.50
Step-by-step explanation:
Since 15% of his total earnings was from raking leaves. The earning from taking leave will be:
= 15% × $90
= 0.15 × $90
= $13.50
Earnings from mowing lawns = $36
The earnings from walking dogs will be:
= $90 - $36 - $13.50
= $40.50
The sum of two numbers is 55 and the difference is 11. What are the numbers
Can you guys help we with this question.
Answer:
40
Step-by-step explanation:
(2x+1/(2x))^5 *(2x -1/(2x))^5
= ((2x)^2 -1/(2x)^2)^5 (a+b)*(a-b) =a2-b2
= (4x^2-1/4(x)^2)^5
now
x =4x^2. ,a = 1/4(x)^2 ,n =5
we have
general term = Cr *x^r *a^(n-r)
= Cr * (4x^2)^r * (1/4(x)^2)^(n-r)
= Cr *4^r * X^2r * 1/( 4^(n-r) *x^(2n-2r)
= Cr * 4^r/4^(n-r) * x^(2r)/x^(2n-2r)
= Cr * 4(2r-n) *x(4r-2n)
now for x^2
4r-2n = 2
4r -10=2
4r =12
r = 3
now for coeff
C(5,3) * 4^(2*3-5)
5!/(3!*(5-3)!) * 4
5*4/(2*1)*4
40
14
Match each graph with the correct slope of the line.
DRAG & DROP THE ANSWER
1
3
1
2
3
1
1
2
2
3
(3x8)x4=3x(?) i need to know what this is
Answer:
32
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
i know someone put this and i needed help with the oof
solve −4>x÷3 i need helpppp
Answer: x < -12
Step-by-step explanation:
a. 16
b. 39
c. 98
d. 21
will give brainliest to whoever can answer fastest
Answer:
I would say B. 39.
Step-by-step explanation:
Hope this helps:)
*WILL MARK BRAINLIEST*
Can a triangle be made from the side lengths? 4 cm, 6 cm, 9 cm
A: Yes, one triangle can be made
B: No, a triangle cannot be made
2/5 kg of soul fills 1/3 of a container so 1 kg of sulfate in the container? Explain or show your reasoning
Answer:
Yes, we can put 1 kg of the soul in the container.
Step-by-step explanation:
Consider the provided information.
2/5 kg of soul fills 1/3 of a container.
It means if we put 2/5 kg of the soul 3 times in the container then the container will be full.
[tex]\frac{2}{5}+\frac{2}{5}+\frac{2}{5}=\frac{6}{5}[/tex]
It means [tex]\frac{6}{5}[/tex] kgs of soul fill the container.
[tex]\frac{6}{5}[/tex] is greater than 1 so it means we can put 1 kg of the soul in the container.