Answer:
f(-2)=7
Step-by-step explanation:
substitute -2 in for x
[tex]f( - 2) = { - 2}^{2} + 3[/tex]
-2×-2=4
4+3=7
Answer:
f(-2)=7Step-by-step explanation:
[tex]f(x)=x^2+3\\\\f(-2)=?[/tex]
Substitute ; -2 for x in the given function
[tex]f(-2)= (-2)^2+3\\\\\mathrm{Calculate\:exponents}\:\left(-2\right)^2\::\quad 4\\\\f(-2)=4+3\\\\f(-2)=7[/tex]
The observatory in the John Hancock Center in Chicago is located in the top floor, 900 feet above the ground. The express elevator travels nonstop from the ground floor to the observatory on the top floor at a rate represented by the equation y=30x, where y is the height, in feet, and x is the number of seconds.
Answer:
Step-by-step explanation:
Given the rate at which the elevator travels modeled by the expression;
y = 30x where y is the height, in feet, and x is the number of seconds.
If the observatory in the John Hancock Center in Chicago is located in the top floor, 900 feet above the ground, we can calculate the time taken to reach the top floor by substituting y = 900 into the equation and solve for x as shown;
y = 30x
900 = 30x
Rearrange
30x = 900
Divide both sides by 30
30x/30 = 900/30
x = 30
Hence it takes 30seconds for the elevator to reach the top floor
428 × (-23 ) + (-428 )× (-223)=
can you answer it with steps it would be a great help for me
Answer:
-935160312
Step-by-step explanation:
What is the equation of the line that goes through the points 2,9 and 3,1
The equation of the line that goes through the given points is y = -8x + 25.
Given the following points:
Points on the x-axis = (2, 3)Points on the y-axis = (9, 1)To determine the equation of the line that goes through the given points:
First of all, we would determine the slope of this line by using the following formula;
[tex]Slope. \;m = \frac{Change \; in \; y \;axis}{Change \; in \; x \;axis} \\\\Slope. \;m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
Substituting the points into the formula, we have;
[tex]Slope, \;m = \frac{1 - 9}{3 - 2}\\\\Slope, \;m = \frac{-8}{1}\\\\[/tex]
Slope, m = -8
Now, we can determine the equation of the line by using this formula:
[tex]y-y_1 =m(x-x_1)\\\\y-9=-8(x-2)\\\\y-9=-8x+16\\\\y=-8x+16+9[/tex]
y = -8x + 25
Read more on slope here: https://brainly.com/question/3493733
I need help pls if u are good at math stuff
(-2.2) · (-2) · (–1) · (5) = ?
1. 88
2. 5 1/2
3. -88
4. -5 1/2
Answer:
My answer came out to -22.
Step-by-step explanation:
Start multiplying from left to right:
Two negatives multiplied are positive:
-2.2·(-2)=4.4
A negative and a positive multiplied equal a negative:
4.4·(-1)=-4.4
-4.4·5=-22
-13 = r/9 + 8
Solve for r
r = -189
-13 = r/9 + 8
Subtract 8 on both sides
-21 = r/9
Multply 9 on both sides
-189 = r
Answer:
r = -189
Step-by-step explanation:
-13 = r/9 + 8
-13 - 8 = r/9
-21 = r/9
-21 × 9 = r
-189 = r
What is the prime factorization of 36?
22 × 9
2 × 32
22 × 32
3 × 13
Answer:
2 x 2 x 3 x 3
Step-by-step explanation:
Answer:
a composite number is written as a product of all of its prime factors, we have the prime factorization of the number. For example, the number 36 can be written as a product of primes as: 36 = 2² x 3². The expression 2² x 3² is said to be the prime factorization of 36.
At 8:00 a.m., the temperature was −6°F. By noon, the temperature had risen by 9°F. What was the temperature at noon?
Please help. jfmnhnhbmnjmjhj
Answer:
d
Step-by-step explanation:
Paula knits hats. The number of hats h she can knit varies directly with the amount of yarn (y) in yards she has. The constant of proportionality is 42. Write an equation to represent the relationship between the number of yards of yarn Paula has and the number of hats she can knit.
Answer:
h = 42y
Step-by-step explanation:
The number of hats h she can knit varies directly with the amount of yarn (y) in yards she has.
h = ky
Where,
h = the number of hats she can knit
y = amount of yarn she has(yards)
k = constant of people = 42
Eequation to represent the relationship between the number of yards of yarn Paula has and the number of hats she can knit.
h = 42y
pls pls help!! will mark u as brainliest, i need 5 statements and reasons.
PL≅YL - Given
∠P≅∠Y - Base Angle Theorem
LA≅AL - Shared Line (sry forgot what it is called)
PLA≅YLA - SAS (Side Angle Side)
hope this helps :)
What is the length of the line?
What can be concluded about a line that passes through the points(1, -2) and (4,-2)? Check all that apply A:The slope is 0. B:The y-intercept is -2. C:The line is vertical. D:The line is horizontal. E:The line has no y -intercept. F:The equation of the line is Y= -2
Answer:
ABDF
Step-by-step explanation:
The answer is A,B,D,F
A is: The slope is 0.
B is: The y-intercept is -2.
D is: The line is horizontal.
F is : The equation of the line is y= -2.
please please help me with this question, this is the third time i’ve asked this question and no one has answered :(
How do I solve 12a+3c=2a+6, for a
Answer:
14a+9c
Step-by-step explanation:
Answer:
Step-by-step explanatio
What is the opposite integer of 53
-53
The opposite of 53 is -53
3n + 6 = 18. What is the value of n
Answer:
n=4
Step-by-step explanation:
if this is a function
Answer:
function - is a relation for which each value from the set the first components of the ordered pairs
King David was a skilled general and a great ruler, who unified Israel. What type of sentence is this? A. a complex sentence B. a compound sentence C. a simple sentence D. a compound-complex sentence
Answer:
C. a simple sentence
Step-by-step explanation:
Simple sentences have one subject and one verb or predicate. Some of these have a direct object or a modifier, but they still only have one subject and one verb. If you need to brush up on these parts of speech, read up on Understanding Subjects, Predicates, and Objects.
plz mark brainliest
Answer:
This is C. A simple sentence
Step-by-step explanation:
This sentence does not consist a conjunction and only consist of one independent clause.
83*98 answer in standard form
Please help me, I really dont want to get an F :((( (The Graph Is In The Image)
The graph shows the data for the time it takes Jerome to bike to school, based on his average biking speed for that trip. Which sentence describes the association?
A.The speed he bikes at affects the time it take him to get to school, but it is unclear if the time increases or decreases.
B. As the average speed increases, the time he takes to get to school decreases.
C. The speed he bikes at does not affect the time it takes him to get to school.
D. As the average speed increases, so does the time he takes to get to school.
Answer:
B: As the average speed increases, the time he takes to get to school decreases.
Step-by-step explanation:
On the graph, it showed that the plotted points are decreasing as the average speed is increasing. Also, I took the test and B was the correct answer.
Can you help me with these angles please????
Answer:
11. ∠9 = 100°
12. ∠6 = 80°
13. ∠8 = 80°
14. ∠2 = 80°
15. ∠5 = 100°
16. ∠11 = 100°
Step-by-step explanation:
Answer:
11. 100° 12. 80° 13. 80° 14. 80° 15. 100° 16. 100°
Step-by-step explanation:
We know a straight line is 180 degrees and that m∠7 is 100 degrees.
m∠9, m∠5 and m∠11 are 100 degrees
To find m∠6, m∠8, and m∠2 we subtract 100 from 180 and get 80 degrees.
If you fill in all the degrees of the angles, you will notice a zig-zag pattern. That helps when solving these kinds of problems
I hope this helped, please mark Brainliest, thank you!
Mrs Thomas walks3/4 of a mile every 1/3 of an hour.How far can she walk in an hour?
Answer:
2.25 miles
Step-by-step explanation:
If she can walk 3/4 of a mile in 20 minutes you need to multiply 3/4 by 3 because 20 times 3 is 60 and there is 60 minutes in a hour
Emma earned $120 at her part-time job.
She also received a bonus of 20% of her
salary for additional hours worked. How
much did Emma earn in all?
Answer:
She earned $144 in total.
PLEASE HELP, URGENT. I’ll name Brainly if correct
Answer:
y=5-9x
Step-by-step explanation:
y is means y=
5 less than means 5-
product of 9 ans x means 9x
so... y=5-9x
Answer:
y = 9x - 5
Step-by-step explanation:
'is' = equal to
'less than' = difference/subtract
'product' = multiply
y = 9x - 5
On a map, the distance between two cities is 26 cm. If the map scale is 2 cm: 11 mi., what is the actual distance between the two cities?
Answer:
143 miles
Step-by-step explanation:
To get the answer, you should first, divide 25 cm by 2 cm = 13 cm so it will be easier for you to multiply. Then you should multiply = 13 by 11 = 143 miles
2(5x+1)−2x=2−2(3x+1)
Answer:
[tex]x = -\frac{1}{7}[/tex]
Step-by-step explanation:
2(5x + 1) - 2x = 2 - 2(3x + 1)
Use the distributive property
10x + 2 - 2x = 2 - 6x -2
Combine like terms
8x + 2 = -6x
Subtract 2 from both sides
8x = -6x - 2
Add 6x to both sides
14x = -2
Divide both sides by 14
x = -2/14 = -1/7
Greatest common factor and disruptive property: rearrange 16 and 36 to look like this _______(_____+_____)
Where did Emory make an error?
Answer:
Uhhh... how do I answer this?
Step-by-step explanation:
There is no way for me to SEE where he made an error.
Please help.................................................................................................
Answer:
Step-by-step explanation:
L = 3*w + 1 Given
P = 2*(L + w) Formula for Perimeter. Substitute for L
P = 2*(3w + 1 + w) Combine
P = 2*(4w + 1)
P = 58 Given
58 = 8w + 2 Remove the brackets
58 - 2 = 8w Subtract 2
56 = 8*w Divide by 8
56/8 = w
7 = w
================
Find L
L = 3*w + 1
L = 3*7 + 1
L = 22
================
Check
2L + 2W = 58
2*22 + 2*7 =? 58
44 + 14 = ? 58
58 = 58
The answer checks.
what is the answer 8/2x4-(3+1)
to this problem
Answer:
14
Step-by-step explanation:
8/2 × 4 - (3+1)
Using the order of operation, PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction), we can figure out the answer to this expression.
8/2 × 4 - (2)
4 × 4 - (2)
16 - 2
14