Answer:
gravity and planetary rotation
Write the ratio as a fraction in lowest terms.
Compare in inches,
2 feet to 45 inches
Answer:
8 to 15
Step-by-step explanation:
2 feet times 12 inches is 24 and it is to 45 inches. You then need to simplify 24 and 45 by 3 to get 8 and 15 and to get the ratio 8 to 15.
Hope this helps!
wht is -2 1/4=r-4/5 wht would r be
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the time that the rocket will hit the ground, to the nearest 100th of a second.
f(x) = -16x^2+272x+110
Answer:
The time that the rocket will hit the ground will be:
x = 17.40 secondsStep-by-step explanation:
Given the expression
[tex]f\left(x\right)\:=-16x^2+272x+110[/tex]
Here:
x represents the time in secondsy represents the height of the rocketWe know that when the rocket will hit the ground, the height will get y = 0
i.e.
[tex]0\:=-16x^2+272x+110[/tex]
solving for x to determine the time that the rocket takes when it will hit the ground.
so
[tex]-16x^2+272x+110=0[/tex]
subtract 110 from both sides
[tex]-16x^2+272x+110-110=0-110[/tex]
[tex]-16x^2+272x=-110[/tex]
Divide both sides by -16
[tex]\frac{-16x^2+272x}{-16}=\frac{-110}{-16}[/tex]
[tex]x^2-17x=\frac{55}{8}[/tex]
[tex]\mathrm{Add\:}\left(-\frac{17}{2}\right)^2\mathrm{\:to\:both\:sides}[/tex]
[tex]x^2-17x+\left(-\frac{17}{2}\right)^2=\frac{55}{8}+\left(-\frac{17}{2}\right)^2[/tex]
[tex]x^2-17x+\left(-\frac{17}{2}\right)^2=\frac{633}{8}[/tex]
[tex]\left(x-\frac{17}{2}\right)^2=\frac{633}{8}[/tex]
[tex]\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}[/tex]
solving
[tex]x-\frac{17}{2}=\sqrt{\frac{633}{8}}[/tex]
[tex]x=\frac{\sqrt{1266}}{4}+\frac{17}{2}[/tex]
x = 17.40 seconds
also solving
[tex]x-\frac{17}{2}=-\sqrt{\frac{633}{8}}[/tex]
[tex]x=-\frac{\sqrt{1266}}{4}+\frac{17}{2}[/tex]
x = -0.40 seconds
As time can not be negative.
Thus, the value of x = 17.40 seconds
Therefore, the time that the rocket will hit the ground will be:
x = 17.40 seconds-7x-1-5x=95 solve for X
Answer:
-8 = x
Step-by-step explanation:
Please help
Factor 5x^2-11x+6. Rewrite the trinomial with the X-term expanded using 2 factors
The answer starts as 5x^2_______+6
Answer:
[tex]5x^2-5x-6x+6[/tex]
Step-by-step explanation:
[tex]5x^2-11x+6\\5x^2-5x-6x+6[/tex]
we need to factorize it so the X-term expanded should satisfy two conditions
1) +5 times +6 should be +30
2) add or subtract any two numbers which multiply and give -11
so here -5 times -6 gives +30 and -5 added to -6 equals -11
I need help fast please hurry
Answer:
3 is the right one
Step-by-step explanation:
What is Y= -x + 3 ??
Answer:
It means that your slope (-x), is equal to -1, and your Y-intercept is 3. It is the equation y=-1x+3.
Step-by-step explanation:
8
Substitute 6 for h.
Answer:
2
Step-by-step explanation:
Answer:
Where is the equation.
Step-by-step explanation:
John spent about 12 hours at a water park. He estimated he spent about 40% of the time waiting in line. What would be a reasonable amount of time he spent in line?
Matthew drove 15 1/2 miles in 1/4 hour what was Matthews average speed
Answer:
Matthews average speed was 62 miles per hour.
Step-by-step explanation:
We know that Matthew drove 15 1/2 miles in 1/4 of an hour. We want to know how many miles Matthew drove every hour. To solve this problem, multiply 15 1/2 by 4.
15 1/2 x 4 = 62
Therefore, Matthews average speed was 62 miles per hour.
Hope this helps! :D
how many birds fly south every year?
Answer:
I believe it is 4 billion
Step-by-step explanation:
Hope I helped!
Which of the following inequalities are correct please help me ;-;
Answer:
A is correct
Step-by-step explanation:
b has a negative value cause it's before 0
but -b will become a positive value thus >0
example:
b is -1
-b = -(-1)
= 1
hope you understand
Answer:
⇨ Choice A.
Step-by-step explanation:
We'll consider three choices and compare the answers with the given number line and points.
⟺ Choice A
This is the correct answer and here is why.
[tex]-b>0[/tex]
Solving Inequality is similar to solving equation. The difference is if the coefficient for the variable is in negative, moving to another side would swap the sign/operator of Inequality.
Thus, our new Inequality would be [tex]b<0[/tex] which is true by the number line itself.
⟺ Choice B
The reason why choice B is not correct because the point a is lesser than the point b. It's obvious that point a cannot be greater than point b.
⟺ Choice C
The reason why choice C is not correct because if we solve the Inequality.
[tex]-b<-c[/tex]
We can either solve for b-term or c-term, the outcome would be the same. I'll solve for both terms.
⇨ Solve for b-term
[tex]-b<-c\\b>\frac{-c}{-1}\\b>c[/tex]
Also remember that moving a negative coefficient would swap the sign/operator of Inequality.
⇨ Solve for c-term
[tex]-b<-c\\\frac{-b}{-1}>c\\b>c[/tex]
As b>c is not true in the number line. We notice that c point is greater than b point.
Thus, the clear answer is A choice.
Pls help i will give brainiest
Answer:
red
Step-by-step explanation:
Answer:
red
Step-by-step explanation:
The y-intercept is -2 and the slope is 3/1. so you start on the y-axis at -2 and move up 3 to the right one.
Jocelyn estimates that a piece of wood measures 5.5 cm. If it actually measures 5.62, what is the percent error of Jocelyns estimate
Answer: The percent error is -2.1352% of Jocelyn's estimate.
14 divided by 413
[tex]14 \div 413[/tex]
Answer:
My answer was 0.0338983, 29 remainder 7
Step-by-step explanation:
Calculate the slope of the line that passes through the points (1, −3) and (3, −5).
Answer:
m= -1
Step-by-step explanation:
slope is -1
Several pennies are tossed in the air. Twelve land heads up and fifteen land tails up. Which of the following ratios are correct?
Answer:
the ratio is 4/5
Step-by-step explanation:
27 pennies all together. just divide the number of each group by the same thing till you no longer get a whole number. like 3÷12 and 3÷15. Do it till you get the smallest whole number for each
Maria is renting kayaks from a local shop that charges a $10 fee, plus an hourly rate of $7.50.
For how long can Maria rent the kayak if she pays a total of $70?
Answer:
8 hours
Step-by-step explanation:
70-10
60÷7.50= 8 hours
Assessment started: undefined.
Item 1
Which expression represents [tex]x^2 + 8x + 16[/tex]in factored form?
[tex](x+4)(x-4)[/tex]
[tex](x−2)(x−8)[/tex]
[tex](x-4)^2[/tex]
[tex](x+4)^2[/tex]
Answer:
(x+4)
Step-by-step explanation:
I need help with this answer?
Answer:
dont u have the answer
Step-by-step explanation:
Tamara bought yarn for $39 and 2 pairs of knitting needles. Her total cost for the yarn and knitting needles was $69. Tamara writes an equation that represents the cost of each pair of knitting needles. If k represents the cost of each pair of knitting needles, which statements about verifying the value of k are true? Check all that apply.
0) Tamara should substitute k = 30 into the equation 39 + 2 k = 69
0) After she substitutes the correct value for k into the equation, Tamara should find that the left side of the equation is equal to the right side.
0) Tamara should substitute k = 15 into the equation 39 + 2 k = 69.
0) After she substitutes the correct value for k into the equation, Tamara should find that the left side of the equation is not equal to the right side.
0) To verify the solution to the equation, Tamara multiplies the solution by 2 and then adds it to 39. Then, she checks that it is equal to 69.
0) To verify the solution to the equation, Tamara adds the solution to 2 and then adds it to 69. Then, she checks that it is equal to 39.
Answer:
Tamara should substitute k = 30 into the equation 39 + 2 k = 69
Step-by-step explanation:
or you can do 69-39=30 so k=30
Answer:
A, C, F
Step-by-step explanation:
just trust me bruv.
I'll give you brainiest and lots of points..
Select the correct answer.
What is the product of (7/8) (-16) (-7) (-1/14) ?
A. -7
B. -9/19
C. -1/7
D. 23/17
[tex]\\ \sf\longmapsto \left(\dfrac{7}{\cancel}8}}\right)\cancel{(-16)}\cancel{(-7)}\left(\dfrac{-1}{\cancel{14}}\right)[/tex]
[tex]\\ \sf\longmapsto 7(-2)(-1)(-1/2)[/tex]
[tex]\\ \sf\longmapsto -14(-1)(-1/2)[/tex]
[tex]\\ \sf\longmapsto -14/2[/tex]
[tex]\\ \sf\longmapsto -7[/tex]
A circular mirror has a circumference of 50 inches. What is the
radius of the mirror? Show your work.
Answer:
7.96 inches
Step-by-step explanation:
[tex]2\pi r = 50\\r = 50/(2\pi )\\r = 7.96[/tex]
hope this helped!
b. Find the standard deviation of the data.
c. Explain what the mean and standard deviation tell you about the data you
collected
HELPPPPPP
Answer:
b. The standard deviation for class 1 is approximately 18.81415
The standard deviation for class 2 is approximately 16.1527
The standard deviation for class 3 is approximately 12.705
c. The mean of the data indicates that the average scores of Class 1 and Class 2 are equal and less than the average score of Class 3
The standard deviation indicates that the data in Class 1 varies more than the data in Class 2, and also, that the data of Class 2 varies more than the data of Class 3.
Step-by-step explanation:
b. The mean and the standard deviation can be calculated using Microsoft Excel with the values presented here as results as follows;
The standard deviation, σ is given by the formula [tex]\sigma =\sqrt{\dfrac{\sum \left (x_i-\mu \right )^{2} }{N}}[/tex], while the formula mean, μ is [tex]\mu = \dfrac{\Sigma x}{N}[/tex]
Where;
N = The number of terms = 12
∑x = 946 for Class 1, 953 for Class 2, 953 for Class 3
The mean for Class 1 = ∑x for Class 1/N = 946/12 = 78.8[tex]\bar 3[/tex]
The mean for Class 2 = ∑x for Class 2/N = 953/12 = 79.41[tex]\bar 6[/tex]
The mean for Class 3 = ∑x for Class 3/N = 953/12 = 79.41[tex]\bar 6[/tex]
[tex]\sum \left (x_i-\mu \right )^{2} }[/tex] for Class 1 = 4247.[tex]\bar 6[/tex]
[tex]\sum \left (x_i-\mu \right )^{2} }[/tex]/N = for Class 1 = 353.97[tex]\bar 2[/tex]
The standard deviation for class 1 σ₁, is given as follows;
[tex]\sigma_1 =\sqrt{\dfrac{\sum \left (x_i-\mu \right )^{2} }{N}} = \sqrt{353.97\bar 2 } \approx 18.81415[/tex]
The standard deviation for class 1 = 18.81415
[tex]\sum \left (x_i-\mu \right )^{2} }[/tex] for Class 2 = 3130.9167
[tex]\sum \left (x_i-\mu \right )^{2} }[/tex]/N = for Class 2 = 260.90972
The standard deviation for class 2 σ₂, is given as follows;
[tex]\sigma_2 =\sqrt{\dfrac{\sum \left (x_i-\mu \right )^{2} }{N}} \approx \sqrt{260.90972 } \approx 16.1527[/tex]
The standard deviation for class 2 = 16.1527
[tex]\sum \left (x_i-\mu \right )^{2} }[/tex] for Class 3 ≈ 1936.917
[tex]\sum \left (x_i-\mu \right )^{2} }[/tex]/N = for Class 3 ≈ 161.4097222
The standard deviation for class 3 σ₃, is given as follows;
[tex]\sigma_3 =\sqrt{\dfrac{\sum \left (x_i-\mu \right )^{2} }{N}} \approx \sqrt{161.40972 } \approx 12.705[/tex]
The standard deviation for class 3 ≈ 12.705
c. The mean indicates that the average score for Class 1 is higher than the average score for Class 2, and that the average score for Class 2 is the same as the average score for Class 3
However, the standard deviation indicates that the variability of the scores for Class 1 is higher than the variability of the scores for Class 2, and that there is also a higher variability in the scores of Class 2 than the variability in the scores of class 3
What is the answer of 1 Bobux+3 Bobux
Answer:
1bobux+3bobux= 4bobux
Step-by-step explanation:
Answer:
it's 4 bobux ;))
What percent is equivalent to 1/25?
A)4%
B)5%
C)20%
D)25%
Description:
To calculate a percent of a number you must find the total amount or the whole number.
After that Divide the number that you wish to determine the percentage for
Then multiply the value from step two by 100.
To find the percent that is equivalent:
Firstly multiply the decimal number times number 100.
Then add to the answer to the % character.
In this case the answer is 4 percent.
Answer: 4 percent
Hope this helps.
a car travels 55 miles per hour for 2 hours complete the table
Answer:
Time distance miles per hour
1 55 55
1/2 27.5 55
1 1/2 82.55 55
2 110 55
What is (x+5)(x-3) in standard form
Answer:
x^2 + 2x - 15
Step-by-step explanation:
Just foil out the terms and you end up with your answer, there isn't much work to actually show here. Hope this helped!
subtract (3x2-2x+5xy-7)from(8-9xy+3x2-5x)
Answer:
-3x-14xy+15
Step-by-step explanation:
[tex](8-9xy+3x^2-5x)-(3x^2-2x+5xy-7)\\\\=8-9xy+3x^2-5x-(3x^2)-(-2x)-(5xy)-(-7)\\\\=8-9xy+3x^2-5x-3x^2+2x-5xy+7\\\\=(8+7)+(-9xy-5xy)+(3x^2-3x^2)+(-5x+2x)\\\\=15-14xy+0-3x\\\\=-3x-14xy+15[/tex]
Type the number only. What is the measure of ∠w?
HINT: You must take 360 and subtract the 2 angles you know. Then take the number you get and divide by 2.
Answer:
The answer should be 100
Step-by-step explanation:
360-80-80=200
200/2=100
