im struggling with this :D i need help!
Answer:
not a real number
Step-by-step explanation:
any negative number under a square root sign, except for 0, isn't real
On evaluating the given roots,
(a) [tex]$-(\sqrt[3]{8}) = -2$[/tex]
(b) [tex]$\sqrt[4]{-81}$[/tex] is not a real number
(a) [tex]$-(\sqrt[3]{8})$[/tex]:
The cube root of 8 is the number that, when raised to the power of 3, equals 8. In this case, the cube root of 8 is 2, because [tex]2^3 = 8[/tex].
Since we have a negative sign in front of the cube root, the result will be the negative value of the cube root of 8.
Therefore, [tex]$-(\sqrt[3]{8}) = -2$[/tex].
(b) [tex]$\sqrt[4]{-81}$[/tex]:
The fourth root of a number is the number that, when raised to the power of 4, equals the given number.
In this case, we are looking for the fourth root of -81.
However, the fourth root of a negative number is not a real number. This is because raising a positive number to an even power (in this case, 4) will always result in a positive value, and there is no real number that, when raised to the power of 4, gives a negative result.
Therefore, the fourth root of -81 is not a real number.
To know more about roots, refer here:
https://brainly.com/question/12105008
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What 2 decimal place number lies between 4.174 and 4.189 ?
How do you solve question 6? (attachment included)
Answer:
9 i think
Step-by-step explanation:
what could be the answer to my question in my maths work : 4.5 x 0.2
Nicole is making tuna salad for her office colleagues. It takes 2/5 of a pound of canned tuna to make 5 portions of salad. She uses 6/5 pounds of canned tuna for every 2 onions used.
If Nicole uses a total of 4 onions, then how many portions of salad does she make?
A.
30 portions
B.
25 portions
C.
35 portions
D.
15 portions
Answer:
She makes 30 portions.
Step-by-step explanation:
To find, you would multiply the amount of tuna you need by the number of onions nicole used.
6/5x2 = 12/5
12/5 ÷ 2/5 = 6
6x5 = 30
She makes 30 portions.
What is the vertex form of the equation?
y=-22 + 122-4
Answer: y=140!!!
:)
Hope you have a good one <3
Which of the following expressions could be used to calculate the volume of the following sphere, with a diameter of 6cm.
Answer:
[tex]\frac{4\pi (3)^{3} }{3}[/tex]
Step-by-step explanation:
Because radio=6/2=3 cm (half of diameter)
I hope this help you
THIS IS MY LAST QUESTION PLEASE HELP ME ILL LOVE U FORVER.
Answer:
Part A: 6250
Part B: No
Step-by-step explanation:
Part B: When Time is 2 Hours, the cost is $30.
30x3=90 < 100
So the unlimited weekly pass is not cheaper
(Find the value of y by given x)
How do you evaluate this expression
Answer:
= 3
Step-by-step explanation:
3x^(2)-4 x=2 HELP ASAP
Answer:
8
Step-by-step explanation:
If you're evaluating, then substitute x=2 into the equation.
That gets you 3(2)^2-4
Then do 2^2 and multiply by 3, that should get you 12
After that, subtract 4 from 12, which gets you 8
Colin buys a tv for £800. It depreciates at a rate of 1% per year. How much will it be worth in 2 years? Give your answer to the nearest penny where appropriate
Answer: £784.08
Step-by-step explanation:
First find 1% of 800, which is 800/100=£8
800-8= £792 after 1 year
find 1% of 792, which is 792/100=£7.92
792-7.92= £784.08
lines c and d are perpendicular. If the slope of like c is -4, what is the slope of line d?
A. 4
B. -1.4
C. -4
D. 1/4
Answer:
A 4
Step-by-step explanation:
-1/-4 = 4
Consider the following data set:
2 , − 3 , − 3 , 1 , 8 , 12 , 14 , 2
Find the lower quartile.
Answer:
1
Step-by-step explanation:
that's the lowest number
The relationship between the number of pounds (lb) of salmon and the price
in dollars is shown in the graph. What is the unit price of salmon?
Answer:
9 dollars per pound of salmon
If a 50 kg object is at a location 25,600 km from Earth’s center, what is the gravitational force exerted by the object on Earth? In what direction does that force act?
Answer:
Approximately [tex]30\; \rm N[/tex] toward the center of the object.
Step-by-step explanation:
Look up the gravitational constant and the mass of the earth:
[tex]\begin{aligned}G &\approx 6.67 \times 10^{-11}\; \rm m^{3} \cdot kg^{-1} \cdot s^{-2} \\ &= 6.67 \times 10^{-11} \; \rm N \cdot m^{2} \cdot kg^{-2}\end{aligned}[/tex].
[tex]M \approx 5.97 \times 10^{24}\; \rm kg[/tex].
Convert the unit of distance to standard units:
[tex]\begin{aligned}r &= 25600\; \rm km \\ &= (25600 \times 10^{3})\; \rm m \\ &= 2.56 \times 10^{7}\; \rm m\end{aligned}[/tex].
Consider two spherical objects with mass [tex]m_{1}[/tex] and [tex]m_{2}[/tex]. Let [tex]r[/tex] denote the distance between the centers of the two objects. By Newton's Law of Universal Gravitation, the size of the gravitational force between these two objects would be:
[tex]\begin{aligned}F &= \frac{G \cdot m_{1} \cdot m_{2}}{r^{2}}\end{aligned}[/tex].
Thus, the size of the gravitational force between this object and the earth would be:
[tex]\begin{aligned}F &= \frac{G \cdot m \cdot M}{r^{2}} \\ &\approx \frac{1}{2.56\times 10^{7}\; \rm m} \\ &\quad \times 6.67 \times 10^{-11}\; \rm N \cdot m^{2}\cdot kg^{-2} \\ &\quad \times 50\; \rm kg \times 5.97 \times 10^{24}\; \rm kg \\ &\approx 30\; \rm N\end{aligned}[/tex].
Since gravitational force is attractive, the [tex]50\; \rm kg[/tex] object in this question would attract the earth through the gravitational force. Thus, this force would point towards the center of this [tex]50\; \rm kg\![/tex] object.
which graph represents the line x=4
Answer:
B
Step-by-step explanation:
With answer B, x is marked 4 on the x-axis and because there was no given y-intercept, the line must be vertical.
Brandon enters bike races. He bikes 9
1
2
miles every
1
2
hour. Complete the table to find how far Brandon bikes for each time interval.
Distance (mi) 9
1
2
Time (h)
1
2
1 1
1
2
2 2
1
2
It's very difficult to understand the chart.Can you please take a screenshot of the chart?
Are the points (3,2) (8,16) (13,8) (14,14) (20,5) (24,8) (27,2) (31,6) (31,3) a function?
Answer:
No, The domains of a same number are said twice.
Step-by-step explanation:
If it is the range (y) it doesn't matter twice or not.
Answer:
The given relation is not a function.
Step-by-step explanation:
Given the relation: {(3,2) (8,16) (13,8) (14,14) (20,5) (24,8) (27,2) (31,6) (31,3)}
A relation is any set of ordered pairs, which can be thought of as (input, output).
A function is a relation in which no two ordered pairs have the same first component (x-values or input) and different second components (y-values or output).
We need to ask ourselves, does every first element (or input) correspond with EXACTLY ONE second element (or output)? In this case, the answer is no. The input value (x = 31) goes with two output values, 6 and 3. It only takes one input or x-value to associate with more than one output value to be invalid as a function.Another way to find out whether a relation or a set of given points represent a function through the Vertical Line Test. If a vertical line intersects the graph in all places at exactly one point, then the relation is a function.
To use the vertical-line test, imagine dragging a ruler held vertically across the graph from left to right. If the graph is that of a function, the edge of the ruler would hit the graph only once for every x -value. If you do this for the given set of points, every vertical line intersects the graph in at most one point, except for the x-value = 31, where the vertical line contains two points (in red dots) in it: (31,6) and (31,3). The given graph fails the Vertical Line Test, which means that it is not a function.
Attached is a screenshot of the graph where I performed the Vertical Line Test.
Please mark my answers as the Brainliest if you find my explanation helpful :)
Please help me with this problem I will give you the brain thing and extra points
Which equation in standard form has a graph that passes through the point (5, -4) and has a slope of -6/5?
A)6x + 5y = 10
B)6x - 5y = 10
C)5x + 6y = 10
D)5x - 6y = 10
Answer:
b
Step-by-step explanation:
what is 2x86 + 87x3 kkkkkkkkkkkkkkk
Answer:
the Answer is 433
Step-by-step explanation:
Answer:
433
Hopefully this is right
Help please and thank you
The answer could be 2 i don’t know really
Answer:
x = [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
The opposite sides of a rectangle are congruent , then
10x - 1 = 4x + 2 ( subtract 4x from both sides )
6x - 1 = 2 ( add 1 to both sides )
6x = 3 ( divide both sides by 6 )
x = [tex]\frac{3}{6}[/tex] = [tex]\frac{1}{2}[/tex] ( = 0.5 )
What is the length of the missing side?
(your answer should be in decimal format up to two decimal place OR left as a square root)
Answer:
the length of missing side is √115(ie.10.723)
-7+ 3x-2(3x+4)= 5(2x-3) + 4 (3x - 1) - 4.
Answer:
[tex] - 7 + 3x - 2(3x + 4) = 5(2x - 3) + 4(3x - 1) - 4 \\ - 7 + 3x - 6x - 8 = 10x - 15 + 12x - 4 - 4 \\ - 3x - 15 = 22x - 15 - 8 \\ 25x = 8 \\ x = \frac{8}{25} [/tex]
The volleyball team needs new uniforms. The students plan to sell plush toy eagles (the school mascot) for $5 each. The students find three companies on-line that sell stuffed mascots. Company A sells 18 eagles for $51.84. Company B sells 12 eagles for $34.32. Company C charges $45.60 for 16 eagles. Which company has the best buy?
Answer:
I think C has the best buy
how many hours and minutes are between 8:00 am and 11:45 am?
Answer:
3 hours and 45 minutes i hope i helped you :)))
Step-by-step explanation:
Please answer all these with shown work I need them now
Answer:
1. 6+x, 2. 8 + 7x^2 - 2x + 5x^3, 3. 16x^3+11x^2-17x-12, 4. (x-2)(x+9), 5. 2x+3)(2x-3), 6. 2x(x+2)(x+5)
Step-by-step explanation:
Number 1
1. 2-3x+5+7+4x-8
2. 7-3x+7+4x-8
3. 14-3x+4x-8
4. 14+x-8
5. 6+x
Number 2
1. 8+3x^2+x -5x^3+4x^2-3x
2. 8+7x^2+x+5x^3-3x
3. 8+7x^2-2x+5x^3
Number 3
1.(simplify) 10x^3 + 5x^2 - 20x + 6x^2 + 3x - 12
2. 16x^3+5^2-20x+6^2+3x-12
3. 16x^3+11x^2-20x+3x-12
4. 16x^3+11x^2-17x-12
Number 4
(x-2)(x+9)
Number 5
(2x+3)(2x-3)
Number 6
2x(x^2+7x+10) or 2x(x+2)(x+5)
A local mechanic charges customers a flat fee of $60 before any work is done and a rate of $85 per hour for labor. Which
equation represents the relationship between the total charge for labor, L, in dollars and the number of hours worked, H?
Answer: The equation would be L = 85H + 60
Step-by-step explanation:
What is the value of x?
Answer:
D. 16
Step-by-step explanation:
1. Because these are vertical angles (opposite pair of angles that are formed by intersecting lines), these are congruent. That means (8x-8) = (7x+8).
2. (Solving)
Step 1: Subtract 7x from both sides.
[tex]8x-8-7x=7x+8-7x[/tex] [tex]x-8=8[/tex]Step 2: Add 8 to both sides.
[tex]x - 8 + 8 = 8 + 8[/tex] [tex]x = 16[/tex]Step 3: Check if solution is correct.
[tex]8(16)-8=7(16)+8[/tex] [tex]128-8 = 112+8[/tex] [tex]120 = 120[/tex]Therefore, the answer is D. 16.
8. Name two line segments.
can anyone fill the blanks?
Answer:
see below
Step-by-step explanation:
2/5 + 1/3 + x = 1
Get a common denominator of 15
2/5 * 3/3 + 1/3 *5/5 +x = 1
6/15 + 5/15 +x = 1
11/15 + x = 1
Subtract 11/15 from each side
11/15 +x-11/15 =15/15-11/15
x = 4/15