Answer:
I think Its either x=7 or x=−7
Hope this helps! :)
Step-by-step explanation:
Let's solve your equation step-by-step.
2x2−50=x2−1
Step 1: Subtract x^2 from both sides.
2x2−50−x2=x2−1−x2
x2−50=−1
Step 2: Add 50 to both sides.
x2−50+50=−1+50
x2=49
Step 3: Take square root.
x=±√49
x=7 or x=−7
Answer:
(
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Step-by-step explanation:
Which of the following mapping diagrams represents a function?
Help ASAP
Answer:
Step-by-step explanation:
The answer is B.
Need help ASAP! Tysm
Answer:
It is -7x + 5
Step-by-step explanation:
I could do a whole explanation, but I'm sure you want the answer quickly. So there ya go. Hope this helps!
Simplify the expression. Write the answer in scientific notation.
(4x10-5) (9x 10-5)
(4x 10-5) (9x 10-5) =
(Simplify your answer. Use scientific notation. Use the multiplication symbol in the math palette as needed.)
Answer:
so you take baby steps 4*10 then subtract 5 then 9*10 then subtract 5
Step-by-step explanation:
Just take baby steps then you will get it
The solution for the scientific notation will be 3.6 x 10⁻¹¹.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that the scientific notation is calculated as below,
E = (4x 10⁻⁵) (9x 10⁻⁵)
E = ( 4 x 9 ) ( 10⁻⁵ x 10⁻⁵ )
E = 36 x ( 10⁻¹⁰)
E = 3.6 x 10⁻¹¹
Therefore, the solution for the expression will be E = 3.6 x 10⁻¹¹.
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Which equation is equivalent to (1/3)x= 27x+2?
multiply everything by 3
x=81x+6
-80x=6
x=6/-80
x=3/-40
Answer:
x= -3/40
x= -0.075
Step-by-step explanation:
-2x + 10 +4x=70 (what is X?)
Answer:
x = 30
Step-by-step explanation:
-2x + 10 +4x=70
-10 -10
-2x + 4x = 60
2x = 60
/2 /2
x = 30
Answer:
x=30
Step-by-step explanation:
combine like terms to get
2x+10=70
then subtract 10 from both sides
2x=60
then divide both side by 2
x=30
A building casts a 33 m shadow when the Sun is at an angle of 26. to the vertical. How tall is the the building, to the nearest meter? Use a trigonometric ratio to find the distance FE. A building casts a 33 m shadow when the Sun is at an angle of 26. to the vertical. How tall is the building, to the nearest meter? Use a trigonometric ratio to find the distance F E.
so basically we just us do this
tan(26)=33/FE
Multiply to get rid of fraction
tan(26)FE=33
divide to get FE alone
FE = tan(26) * 33
FE=16.0951m
so it should be 16.0951m
PLEASE HELP!!!
Which answer choice shows the numbers in order from least to greatest?
A) 2/3, -1/2, 7/12, 0.82
Answer:
- 1/2 7/12 2/3 . 82
Am I right
What is the value of the 8 in the number 24.387.Give your answer as a fraction
Answer:8/100
Step-by-step explanation:
Answer:
Be more specific next time, please. If you are asking what percent 8 is of 24.387, the answer is 33.333333333333% or 3/8.
what are corresponding angles
Answer:
any pair of angles each of which is on the same side of one of two lines cut by a transversal and on the same side of the transversal.
Step-by-step explanation:
When two lines are crossed by another line (called the Transversal), the angles in matching corners are called Corresponding Angles. i attached some images to help show you :)
i hope this helps!! <3
A maps scale is 1 inch: 2.4 miles. The map shows an airport that is 5 inches away from a city. How far away is the airport actually from the city? ____ miles
Answer:
12 miles
Step-by-step explanation:
1 times 2.4 is 2.4. 5 inches times 2.4 is 12.
Ebony attended 75% of 32 school events. How many school events did she NOT attend?
Answer:
8.
Step-by-step explanation:
25% of 32=8
25*32=800
800/100=8
8 events
The points (-2, a) and (-4, -10) fall on a line with a slope of 8. What is the value of a ?
а=
Answer:
(-2, -3)
Step-by-step explanation:
4 - 2 =2 + 1= 3 welcome :)
0.4(20-10m)+ 2.5-2m-12.5
Answer:
-2-6m
Step-by-step explanation:
The quotient of a number and eleven.
Answer:
thats crazy man
Step-by-step explanation:
C (x) = 0.05x+9.25
What is the total rental cost if Jose drove 40 miles?
V dollars
?
Answer:
11.25 dollars in 40 miles.
Step-by-step explanation:
Plugging 40 in for x, we get the equation C(x) = 0.05(40) + 9.25. We do the math, get 2 + 9.25, add, and get the answer 11.25.
Which expression is equal to 72
Answer: The last one is equal to 72
Step-by-step explanation:
2^3*3^2
2*2*2*3*3=72
Please help pre algebra it’s super hard
Answer:
a reflection and then a translation
a translation and then a rotation
a rotation and then a reflection
Hope this helps
Mr. Styranko and his wife combined ate 9 pieces of the wedding cake. Mr
Styranko ate 3 pieces of cake and his wife ate 14 of the total cake.
a.
Write an equation to determine how many pieces of cake (c) there
was in total.
b.
Find the total number of pieces of cake
wdym: 14 of the total cake
3rd time posting this dont skip need help ASAP and pls hurry bc i dont have much time i will give 10 pts + brainliest
Answer:
b 25 degrees
Yosef typed a 48-word paragraph in 1/3 minute. What is his typing speed, in words per minute? I’m desperate please help me
Answer:
54 Words Per Minute
Hope I helped!
What is the range of the function?
Answer:
D all real numbers
Step-by-step explanation:
Hope this helped
Pete is having a cup of black coffee with breakfast. The glass weighs 100g and holds 100mL, so he says that the drink (the cup and coffee together) weighs 200g. Explain why Pete is mistaken
Answer:
The units g and mL measure different quantities.
Step-by-step explanation:
Pete knows the glass weighs 100g, so this is the weight of the cup.
It holds 100 mL, however, mL measures volume, not weight.
Pete is wrong about saying that the cup and coffee together weigh 200 g, because you cannot add two values together that have different units.
In this example, you cannot add together the weight of the cup and volume of the coffee, in order to get the total weight. You would have to find the weight of the coffee, then add that to the cup's weight.
So, Pete is wrong because you cannot add 2 values together that have different units.
Different quantities are measured by the units g and mL.
What is unit conversion?Multiplication or division by a numerical factor, selection of the correct number of significant figures, and unit conversion are all steps in a multi-step procedure.
Pete knows the glass weighs 100g, so this is the weight of the cup. It holds 100 mL, however, mL measures volume, not weight. Pete is mistaken when he claims that the coffee and cup combined weigh 200 g since you cannot add two values with different units of measurement.
In this case, you cannot calculate the entire weight by adding the weight of the cup and the volume of the coffee. You would need to determine the weight of the coffee and then increase it by the weight of the cup.
Therefore, Pete is wrong because you cannot add 2 values together that have different units.
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Karen made $85 for 5 hours of work. At the same rate, how much would she make for 8 hours
Answer:
The correct answer would be $136
Step-by-step explanation:
If Karen made $85 in 5 hours and you want to figure out how much she would make in 8 hours, then you would first need to know how much she makes in 1 hour. Do to that, you would divide from 85 by 5, which would then give you 17. So that tells you how much Karen makes in 1 hour, now to find out how much she makes in 8 hours, all you have to do is multiply 17 and 8. Therefore, the answer to your question is Karen would make $136 in 8 hours.
Hope I helped
Challenge The price of Stock A at 9 A.m. was $14.26. Since then, the price has been increasing at
the rate of $0.13 each hour. At noon the price of Stock B was $15.01. It begins to decrease at the
rate of $0.09 each hour. If the two rates continue, in how many hours will the prices of the two
stocks be the same?
In about hours, the prices of the two stocks will be the same.
(Round to the nearest tenth as needed.)
Answer:0.6
Step-by-step explanation ik because i was told after listening to some dumb kid telling me the wrong answer its 0.6
Eric took a test. All the questions have equal value. He answered 38 of the questions correctly.
This was 95% of the test questions. How many total questions were on the test?
Answer:
72% your welcome lolbrhdhhdvdceuegcstditdti
Name the additive inverse of 5 + I
Answer:
so
Step-by-step explanation:
For example, the additive inverse of the positive number 5 is -5. ... This means that the additive inverse of a negative number is positive. For instance, if x equals -12, then its additive inverse is y = 12.
The additive inverse is (-5) + (-1)
what is additive Inverse?To get a result equal to 0, add the original number and the additive inverse by simply changing the sign of the integer. On the basis of negation of the original number, the characteristics of additive inverse are listed below. For instance, if x is the starting number, then -x is x's additive inverse.
Given:
5 + I
As, the additive inverse is the opposite sign of the given number.
For example, if the number is -6 and we have to find its additive inverse.
So, the additive inverse will be 6.
So, the additive inverse is (-5) + (-1)
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11 Pause
Jose's batting average is 0.250 after 160 times at bat, which means he made a hit 40 of the times he was at bat. He wants to
improve his batting average to 0.333. If he makes a hit the next x times at bat, which equation can be used to calculate the number
of hits needed to obtain this improved batting average?
O A. 2+40
160
.333
Answer:
Step-by-step explanation:
Given that:
Batting average = 0.25 after 160 times at bat;
Batting Average = Number of hits / number of times at bat
0.25 = number of hits / 160
Number of hits = 0.25 * 160 = 40
He want batting average to improve to 0.333 ; if he makes hit the next x times at bat ; number of hits is needed to improve batting average
Hence,
New average = number of hits / number of times at bat
0.333 = (number of hits + x) / (160 + x)
0.333 = (40 + x) / (160 + x)
The function f(x) = In(x) has a domain of all real numbers greater than zero and a range of all real numbers. The
inverse of this function is f-?(x) = ell. Which conclusion can be drawn by comparing the two functions?
The domain of f(x) is all real numbers and the range is all real numbers.
The domain of f(x) is all real numbers greater than 0 and the range is all real numbers.
The domain of f-1(x) is all real numbers and the range is all real numbers greater than 0.
The domain off-1(x) is all real numbers greater than 0 and the range is all real numbers greater than 0.
Answer: The domain of f-1(x) is all real numbers and the range is all real numbers greater than 0.
Step-by-step explanation:
The inverse function of f(x) = ln(x) is:
f-1(x) = exp(x).
And as:
The domain of f(x) is: x ∈ R, x > 0.
The range of f(x) is: x ∈ R
Then for the inverse, we should have the opposite:
The domain of f-1(x) is: x ∈ R (the exponential function does not have any problems like the logarithm, so you can actually input any real value).
The domain is: x ∈ R, x > 0.l
Because, for example:
e^0 = 1
e^-1 = 1/e > 0.
e^-n = 1/e^n > 0.
e^x is always positive, then the range is the set of all real numbers large than zero.
Answer:
The answer is C.
Step-by-step explanation:
Who’s smart. You have a car that drives 30 miles per hour if your car drove 24 hours what mile would you be at.
Answer:
720
Step-by-step explanation:
Hope this helps:)
Answer:
You drove 720 miles
Step-by-step explanation:
You would use the equation 24x30 and that would give you 720 miles driven.
Triangle ABC is similar to triangle XZY. Find the missing side x using proportions ( PLEASEE HELP ASAP)
Answer:
x=70º
Step-by-step explanation:
Triangle ABC, A/C=50º, B/C=40º
40º+50º=90º
Triangle XZY, Y/Z=20, Y/X=x
Since it is a right triangle it will add up to 90º.
So 90º-20=70
The missing angle x is 70
x= 70
The length of the unknown side of the triangle XYZ is 25 units.
What is similarity of triangles?
Two figures are similar if their corresponding angles are congruent , and the ratios of the lengths of their corresponding sides are equal. This common ratio is called the scale factor.
Given is Triangle ABC which is similar to triangle XZY.
Since both the triangles are congruent to each other, their corresponding sides will be in equivalent ratios. Therefore, we can write-
BC/YZ = AC/YX
40/20 = 50/x
x = (50 x 20)/40
x = 50/2
x = 25
Therefore, the length of the unknown side of the triangle XYZ is 25 units.
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