Answer:
Step-by-step explanation: !!DISCLAIMER IM NOT ALWAYS THE SMARTEST BUT IM PRETTY SURE THIS IS RIGHT!
!well what I did. You know that 60 minutes=one hour. So I put 2 & 1/2 over 60.
Make 2 & 1/2 a improper fraction=5/2.
So 5/2 over 60
Then divide. 5/2 divided by 60 ( which is 60/1)
Then leave change flip, meaning leave the 5/2 change the division sign to multiplication, and flip, which you would flip 60/1 to 1/60
So we have 5/2 times 1/60. Multiply across. 5 times 1= 5. 2 times 60=120
So we have 5/120
Now we simplify 120 divided by 5 = 24. And 5 divided by 5 = 1
So 1/24
That’s all I know.. I know it didn’t have the answers but I hoped it help a bit
Why is 18:3 and 6:1 equivalent ratios
Answer:
Because if you multiply 6 three times, it comes out to be 18.
So basically, 6 x 3 = 18
To be sure, 18 ÷ 6 = 3
So, 18:3 = 6:1
18:3 and 6:1 are equivalent ratios because those are equivalent fractions.
What is the ratio?Suppose that we've got two quantities with measurements as 'a' and 'b'
Then, their ratio(ratio of a to b) a:b
or [tex]\dfrac{a}{b}[/tex]
We usually cancel out the common factors from both the numerator and the denominator of the fraction we obtained. Numerator is the upper quantity in the fraction and denominator is the lower quantity in the fraction).
Suppose that we've got a = 6, and b= 4, then:
[tex]a:b = 6:2 = \dfrac{6}{2} = \dfrac{2 \times 3}{2 \times 1} = \dfrac{3}{1} = 3\\or\\a : b = 3 : 1 = 3/1 = 3[/tex]
Remember that the ratio should always be taken of quantities with same unit of measurement. Also, ratio is a unitless(no units) quantity.
Explanation;
If we get the factors of the first ratio, we will see that;
18: 6 and 3, and 18 and 1
3: 3 and 1
Hence, if we display the ratios in fractions;
18/3 = 6/1
And then we write them in factors, we will get;
3x6/3x1 = 6/1
Simplifying;
3/3 x 6/1 = 2/1 x 3/1 = 1/6
Therefore, 18:3 and 6:1 are equivalent ratios.
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The distance D that a spring is stretched by a hanging object varies directly as the weight W of the object. if a 9-kg object stretches a spring 54cm, find the distance when the weight is 2-kg. round your answer to the nearest whole centimeter.
a. 65 cm
b. 12 cm
c. 0 cm
d. 6 cm
Please select the best answer from the choices provided.
.A
.B
.C
.D
Answer:
I think it is b
Step-by-step explanation:
The distance when the weight is 2 kg will be 12 cm. Then the correct option is B.
What is the spring force?The spring force is directly proportional to the deflection of the spring. Let 'x' be the deflection of the spring due to force 'F'. Then the spring force is given as,
F ∝ -x
F = - kx
mg = - kx
The distance D that a spring is stretched by a hanging object varies directly as the weight W of the object. if a 9-kg object stretches a spring 54cm. Then the spring force is calculated as,
9g= - k (54)
- g / 6 = k
Then the equation is given as,
F = (g / 6) x
The distance when the weight is 2 kg will be given as,
2g = (g / 6) x
12 = x
The distance when the weight is 2 kg will be 12 cm. Then the correct option is B.
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Please help thank you so much I mark as brainliest
The coordinates of point R are (-8, 7)
need help again please i’m sorry...
Answer:
The slope is -1/5
Step-by-step explanation:
y = mx +b is in slope intercept form
m is the slope and b is the y intercept
y = -1/5x -1
The slope is -1/5 and the y intercept is -1
Answer:
Step-by-step explanation:
The slope is -1/5
Twenty point question!
Answer:
yes
no
Step-by-step explanation:
i hope im correct please give me brainliest and some feedback if im correct or not :)
Solve and show your work.
12-[2 + 6 ÷ (10 - 2³)]
Answer:
7
Step-by-step explanation:
[tex]2^{3} = 8[/tex] Plug 8 in: 12 - [2 + 6 ÷ (10 - 8)]10 - 8 = 2Plug 2 in: 12 - [2 + 6 ÷ (2)]6 ÷ 2 = 3Plug 3 in: 12 - [2 + 3]2 + 3 = 5Plug 5 in: 12 - 512 - 5 = 7I hope this helps!
Find an equation of the line perpendicular to the graph of 10x - 5y = 8 that passes through the point at (-4, 7).
y = 2x + 5
a.
C.
1
•x-5
y =
b.
d.
1
y = -x + 5
2
1
y = --X + 5
Please select the best answer from the choices provided
A
B
ОООО
C
D
Answer:
Step-by-step explanation:
you want a line with slope = -1/2
So, using the point-slope form of the line,
y-7 = -1/2 (x+4)
y = -1/2 x + 5
Hard to tell what your choices are ...
Round the number to the place of the underlined digit. 42.76 The rounded number is
Answer:
what am i supposed to be rounding to
Step-by-step explanation:
if i was rounding to the tenths it would be 42.8
You have solved a radical equation. What should you do to check whether your proposed solution is correct?
You should check your proposed solution in any of the equations you found while looking for the solution.
You don't need to check whether your proposed solution is correct. You know you followed the proper method, so it should be fine.
You should check the proposed solution in the original equation.
You should check the proposed solution in the back of the book because it is always right.
Answer:You should check the proposed solution in the original equation.
Step-by-step explanation:
The radical is the symbol that is used to represent the root in the expression n√x. The correct option is C.
What is a radical?The radical is the symbol that is used to represent the root in the expression n√x.
You have solved a radical equation. Now, to check whether your proposed solution is correct You should check the proposed solution in the original equation.
Hence, the correct option is C.
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hugo sells handmade key chains online yesterday he made 6 keychains in 30 minutes hugo wants to make 9 keychains today if hugo works at the same rate today how long will it take him to make the keychains
Answer: 45 minutes.
Step-by-step explanation:
First, divide. 30 divided by 6 is 5.
Then, multiply 5 and 9. That equals 45 so 45 is your answer.
It takes 45 minutes to make the 9 keychains.
Given that, Hugo sells handmade key chains online yesterday he made 6 keychains in 30 minutes.
What are proportions?Proportion, in general, is referred to as a part, share, or number considered in comparative relation to a whole. Proportion definition says that when two ratios are equivalent, they are in proportion. It is an equation or statement used to depict that two ratios or fractions are equal.
Let the time taken to make 9 keychains be x.
Now, 6:30::9:x
⇒ 6×x=30×9
⇒ 6x=270
⇒ x=45 minutes
Therefore, it takes 45 minutes to make the 9 keychains.
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What is the y-intercept of y = 2x + 5
Answer:
5
Step-by-step explanation:
Which Property of Addition does 9 + 0 = 9 illustrate ? A. Distributive Property B. Identity Property C. Zero Property D. Commutative Property
Answer:
B. Identity Property
Use the multiplier method to increase £72 by 12%
You must show your working.
Answer:
£80.62
Step-by-step explanation:
100+12%=112%
112/100= 1.12
1.12*£72 =£80.62
Which equation is an identity?
3(x – 1) = x + 2(x + 1) + 1
x – 4(x + 1) = –3(x + 1) + 1
2x + 3 = 2 x plus 3 equals StartFraction one-half EndFraction left-parenthesis 4 x plus 2 right-parenthesis plus 2.(4x + 2) + 2
StartFraction one-third EndFraction left-parenthesis 6 x minus 3 right-parenthesis equals 3 left-parenthesis x plus 1 right-parenthesis minus x minus 2.(6x – 3) = 3(x + 1) – x – 2
Answer:
c. 2x + 3 = 1/2(4x+2)+2
Step-by-step explanation:
Hope this helpss!!
Answer:
2x + 3 = 1/2(4x+2)+2
Step-by-step explanation: on edge
Solve for N.
5
6
15
N
Solve the rational equation 4 divided by x equals quantity 3 times x plus 2 end quantity divided by x squared, and check for extraneous solutions.
Answer:
x = 2
Step-by-step explanation:
Step 1: Write equation
[tex]\frac{4}{x}=\frac{3x+2}{x^2}[/tex]
Step 2: Solve for x
Cross multiply: [tex]4x^2=x(3x+2)[/tex]Distribute x: [tex]4x^2=3x^2+2x[/tex]Subtract 3x² on both sides: [tex]x^2=2x[/tex]Subtract 2x on both sides: [tex]x^2-2x=0[/tex]Factor: [tex]x(x-2)=0[/tex]Solve: [tex]x = 0, 2[/tex]Step 3: Check
Plug in x to verify it's a solution.
Substitute: [tex]\frac{4}{0}=\frac{3(0)+2}{0^2}[/tex]Evaluate: undef (cannot divide by 0)Substitute: [tex]\frac{4}{2}=\frac{3(2)+2}{2^2}[/tex]Evaluate: [tex]2=\frac{6+2}{4}[/tex]Evaluate: [tex]2=\frac{8}{4}[/tex]Evaluate: [tex]2=2[/tex]Given a normal distribution with u = 75 and o = 40, if you select a sample of n = 16, a) what is the probability that the sample mean is above 95? (4 d.p.) b) What is the value, of which there is 97.5% chance that a sample mean is less than that value? (1 d.p.)
Answer:
a) 0.0228
b) 94.6
Step-by-step explanation:
The formula for calculating a z-score when you are given a random.number of samples is z = (x-μ)/σ/√n
where x is the raw score
μ is the population mean
σ is the population standard deviation
n = random number of samples
Given a normal distribution with u = 75 and o = 40, if you select a sample of n = 16,
a) what is the probability that the sample mean is above 95? (4 d.p.) b)
= x = 95
Hence:
z = 95 - 75/40/√16
= 20/40/4
= 20/10
= 2
Probability value from Z-Table:
P(x<95) = 0.97725
P(x>95) = 1 - P(x<95) = 0.02275
The probability that the sample mean is above 95 to 4 decimal places = 0.0228
b) What is the value, of which there is 97.5% chance that a sample mean is less than that value?
97.5% chance = z score for the confidence interval = 1.96
Hence:
z = (x-μ)/σ/√n
1.96 = x - 75/40/√16
1.96 = x - 75/ 40/4
1.96 = x - 75/10
Cross Multiply
1.96 × 10 = x - 75
19.6 = x - 75
x = 19.6 + 75
x = 94.6
The value, of which there is 97.5% chance that a sample mean is less than that value is 94.6
(x7) - 3 = 4
Find what X = ?
Answer:
1
Step-by-step explanation:
add 3 to 4
(1x7)= 7
Which relation is not a function?
{(1,5), (2,6), (3,6), (4,7)}
{(4,7, (2,1), (-3,6), (3,4)}
{(-1,6), (1,3), (2,5), (1,7)}
{(-1,2), (0,5), (5,0), (2,-1)}
Answer: C
Step-by-step explanation:
The X value repeats itself
Step-by-step explanation: In order for a function not to be a relation,
each x-coordinate must correspond to more than one y-coordinate.
Notice that in third relation, the 1 pairs with a 3
in one case and it pairs with a 7 in the other case.
Since each x-coordinate pairs with more than one y-coordinate,
this relation is not a function but the other ones are functions.
Suppose set A contains 336 elements and the total number elements in either set A or set B is 642. If the sets A and B have 78 elements in common, how many elements are contained in set B?
Answer:
math
Step-by-step explanation:
Simon began a weight-loss program. He loses weight every two weeks. His weight, in pounds, t months after he began the weight-loss program, is shown by the following expression.
210(0.94)2t
Which statement below best describes the base, 0.94?
A. Simon's weight before he beganm the weight-loss program
B.the rate which Simon loses weight
C. the monthly decrease in Simon's weight
D. the numbers of times Simon has lost weight since he began the weight-loss program
How do i graph y=4x + 5
Answer:
it would look like the picture below
Step-by-step explanation:
Explain how you could use either multiplication or division to solve the same equation.
Answer:
Multiply By Decimal
Step-by-step explanation:
If you multiply a number by a decimal you get the same outcome that you would if you would have divided it
7th grade math help me plzzzz
Answer:
35
Step-by-step explanation:
What is the solution of z + 5 = 6
Answer:
1
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
z + 5 = 6
collecting Like Terms
(Alphabet On the Left hand , Numbers on the Right hand)
z = 6 - 5
while A Poaitive number Crosses Equality Sign it Chnages Sign
z = 1
fiona has a box of chocolates the box contains 60 chocolates she eats 1/5 of the chocolates she gives 32 chocolates away what is the fraction of the chocolates does she have left answer in simplest form
Answer:
4/15
Step-by-step explanation:
Please help ASAP
Thank you
Solve for x
12 = 10
18 = x
Step-by-step explanation:
12=10 I think you have to add 10+2and then you get 12.
18=×you will have to multiply 18 by a number probably by 10 or 12
Help whats the answer to this Help plz
Answer:
3/5
Step-by-step explanation:
when you multiply powers by a zero it = 0 so you would just end up with 3/5
F(x)=2x+2 solve the inverse when x=4