Answer:
This means that the isotope of silicon with a mass number of 28 is by far the most common of these three isotopes.
Explanation:
The abundance of Si-28 is 92.23%. Si-29 is 4.68% and Si-30 is 3.09%.
What is an equation of the line that passes through the points
(−4,−5) and
(−2,−6)? Put your answer in fully reduced form.
Answer:
(– 4,– 5) = –9
(– 2,– 6) = –8
For the function f(x) = 7x + 5 Find f(-2)
Answer:
-9
Step-by-step explanation:
f(-2)=7(-2)+5
f(-2)=-14+5
f(-2)=-9
Find the measure of angle one…. PLEASE HELP!!!!!!
Answer:
Step-by-step explanation:
9x - 5 = 58
9x = 63
x = 7
<2 = 32°
7y + 27 + 58 + 32 = 180
7y + 117 = 180
7y = 63
y = 9
for <1: x + 58 = 180
x = 122°
write an expression that is equvalient to 3/5 (3y+15)
Answer:
not mine but yeah <3
Step-by-step explanation:
Which one is the independent
Answer:
if u post the picture of the question or explain more detail i could help u out
Step-by-step explanation:
Write the following numbers as a fraction in its simplest form.
1. 0.218
2. 2.72
3. 0.0005
4. 0.012
ALSO I NEED THIS NOW
what is 54x32
bTW thIS iS foR mY aunT agaIN sO yeaH plZ hElP mEh
Answer:
1728
Step-by-step explanation:
Answer:
1728
Step-by-step explanation:
54*32=1728
I have no clue what these are! help: (
Answer:
B. perpendicular to a line at a point on the line
Step-by-step explanation:
that's how you would construct a perpendicular line to the point that is on the line
ANSWER PLEASE QUICKLY!!!!!!! NOW!!!!
Which situation could NOT represent a proportional relationship?
The amount an employee who makes $9.50 per hour earns in h hours
The weight in x weeks of a puppy that gains 4 pounds per week if its starting weight is 16 pounds
The number of gallons of water in x barrels with 33 gallons of water in each barrel
The cost of purchasing p pounds of bananas for $0.36 per pound
Answer:
Trump is ugly
Step-by-step explanation:
Trump sucks
−4x+1=
\,\,-9x+16
−9x+16
Answer:
x=31/14
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
−4x+1=−9x−16+9x+16
−4x+1=−9x+−16+9x+16
−4x+1=(−9x+9x)+(−16+16)(Combine Like Terms)
−4x+1=0
−4x+1=0
Step 2: Subtract 1 from both sides.
−4x+1−1=0−1
−4x=−1
Step 3: Divide both sides by -4.
−4x−4=−1/-4
x=1/4
need help with question 7. its due at 11:59 pm
Answer:
hi
Step-by-step explanation:
hi
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A football team has an away game, and the bus breaks down. The coaches decide to drive the players to the game in cars and vans.
Four players can ride in each car. Six players can ride in each van. There are 48 players on the team. The equation 4.3 + 6y = 48
models this situation, where x is the number of cars and y is the number of vans
Answer 2x and 7y
Step-by-step explanation:
Question:
Find 4 possible solutions in the context of the problem.
The 4 possible solutions in the context of the problem are (0, 8), (3, 6), (6, 3), and (9, 2)
Given the equation that models the situation expressed as:
4x + 6y = 48
We are to find 4 possible solutions for x and y. Note that the values of x and y must be integers.
If there are no cars i.e. at when x = 0
4(0) + 6y = 48
0 + 6y = 48
6y = 48
y = 48/6
y = 8
One of the solution is (0, 8)
If there are 3 cars, i.e. at when x = 0
4(3) + 6y = 48
12 + 6y = 48
6y = 48 - 12
y = 36/6
y = 6
The second solution will be (3, 6)
If there are 6 cars, i.e. at when x = 6
4(6) + 6y = 48
24 + 6y = 48
6y = 48 - 24
y = 24/6
y = 4
The third solution will be (6, 3)
If there are 9 cars, i.e. at when x = 9
4(9) + 6y = 48
36 + 6y = 48
6y = 48 - 36
y = 12/6
y = 2
The fourth solution will be (9, 2)
Hence the 4 possible solutions in the context of the problem are (0, 8), (3, 6), (6, 3), and (9, 2)
Learn more here: https://brainly.com/question/2159099
9. The width of a rectangle is six inches less than its length. If the perimeter of this rectangle is 20 inches, find
the width.
1) 6 inches
2) 2 inches
3) 8 inches
4) 4 inches
Is this relation a function?
True
False
Can someone please help me with these problems? Will mark brainliest
Answer:
1/6
2/6 or 1/3
Step-by-step explanation:
Evaluate.
3 -1
PLEASE EXPLAIN HOW TO DO THIS!!
Answer:
-1
Step-by-step explanation:
Simplify the radical by breaking the radicand up into a product of known factors, assuming real numbers.
Which linear inequality represents the graph below?
A. 12-x+1
B. y> -*x+1
C. y24x+1
D.y> 5x+
Only do number 2
Please help me vote you brainiest
Answer:
he should use the 5/8 inch wide plank
Step-by-step explanation:
9/16 = 4.5/8 which is smaller than 5/8
The answer will be prime
Mark is solving the following system.
X+y+Z= 2(1)
3x+2y+z=8 (2)
4x-y-Tz= 16 (3)
Step 1: He multiplies equation (1) by 7 and adds it to equation (3). Step 2: He multiplies equation (3) by 2 and adds it to equation (2)
Which statement explains Mark's mistake?
Answer:
the answer is c
Step-by-step explanation:
i just finished the quiz
He did not eliminate the same variables in steps 1 and 2
What is the slope of the line? PLEASE HELP
A group of 19 students want to see the show at the planetarium. Tickets cost $11 for each student who is a member of the planetarium's frequent visitor program and $13 for each student who is not a member. The total cost of the students' tickets is $209. Use this information for Items 9–16.
Answer:
All the student are members of the planetarium's frequent visitor program.
Step-by-step explanation:
Let x represent the number of student who are members of the planetarium's frequent visitor program.
And let y represent the who are not a member.
Then two equations can be formed using the provided data:
x + y = 19...(i)
11x + 13y = 209...(ii)
Multiply (i) by 13 and solve for x as follows:
13x + 13y = 247
-11x - 13y = -209
2x = 38
x = 19
Substitute x = 19 in (i) and solve for y as follows:
x + y = 19
19 + y = 19
y = 0
Thus, all the student are members of the planetarium's frequent visitor program.
what is the lcm of the numbers 96 and 72
Answer:
288: least common multiple
Step-by-step explanation:
Answer:
The LCM of 96 and 72 is 1,656
Step-by-step explanation:
A windshield wiper blade is 9 inches long. To the nearest square inch, what is the area covered by the blade as it rotates through an angle of 50 degrees
Answer:
The area covered by the wiper blade is 35 square inches
Step-by-step explanation:
Here, we want to calculate the area covered by the blade of the wiper
Mathematically, this is simply the area of the sector formed by the wiper on the screen
This can be calculated as follows;
theta/360 * pi * r^2
From the question theta = 50 degrees
r = the length of the wiper = 9 inches
So the area is;
50/360 * 22/7 * 9^2 = 35.35714285714286
This is closest to 35 square inches
The answer must be an explanation and equation
Answer:
(4.91, 3.5)
Step-by-step explanation:
6x+21y=103
+
-6x+23y=51
=
44y=154
y=3.5
6x+21(3.5)=103
6x+73.5=103
6x=29.5
x=4.91
(4.91, 3.5)
Answer:
The answer is (4,6) because you would have to eliminate the -6 and 6 to get the y which would be 24y and then divide 154/24 which is roughly 6 and then put that in to get x which is roughly 4
you can also use elimiation for y as well
Gaira was asked to evaluate the algebraic expression –3.8x + 6 when x = –7.5. –3.8(–7.5) + 6(–7.5)Gaira was asked to evaluate the algebraic expression –3.8x + 6 when x = –7.5. –3.8(–7.5) + 6(–7.5) 28.5 + (–45) (–16.5) What mistake did she make 28.5 + (–45) (–16.5) What mistake did she make? What is the correct answer?
Answer:
See explanation
Step-by-step explanation:
Given
[tex]x = -7.5[/tex]
[tex]Expression: -3.8x + 6[/tex]
Required
Determine Gaira mistake
When Gaira solved the expression, she solved as:
[tex]-3.8x + 6x[/tex]
Giving her
[tex]-3.8x * -7.5 + 6 * -7.5[/tex]
This is incorrect as the correct expression is
[tex]-3.8x + 6[/tex]
and it is solved as follows:
Substitute -7.5 for x in -3.8x + 6
[tex]-3.8x + 6[/tex]
[tex]-3.8 * -7.5 + 6[/tex]
[tex]28.5 + 6[/tex]
[tex]34.5[/tex]
34.5 is the correct solution
Answer:
Gaira made a mistake when substituting the value –7.5 in for x. She multiplied both terms of the expression by –7.5 when she should have only multiplied –3.8 by –7.5. The correct answer is 34.5.
Step-by-step explanation:
Did the ED2020
How do you do 4x+9=2x-6
Answer:
[tex]x = \frac{-15}{2}[/tex]
Step-by-step explanation:
to answer these types of questions, we want to isolate the variable to one side of the equation
[tex]4x + 9 = 2x - 6\\4x - 2x = -6 - 9\\2x = -15\\x = \frac{-15}{2}[/tex]
Answer:
x = -7.5 :)
Step-by-step explanation:
4x + 9 = 2x - 6
-2x -2x
----------------------
2x + 9 = -6
-9 -9
-----------------------
2x = -15
--- ----
2 2
x = -7.5
The distance from City A to City B is 75,300 metres. The distance from City B to City C is 51,800 metres. Ross drives from City A to City C through City B. He drives for 62,400 metres before taking a rest. What is the remaining distance that Ross has to drive to reach City C ?
what is the answer for this question it's really urgent
Laura was asked to estimate the volume of dirt in a large hill outside her school. She decides to model the hill using a truncated cone. She estimates that the hill has a base diameter of 80 feet, a top diameter of 40 feet, and a helght of 24 feet. What is the approximate volume of dirt in the hill?
Answer:
The approximate volume of dirt in the hill = 70372 ft³
Step-by-step explanation:
From the given information:
Laura uses a model of a truncated cone to estimate the volume of the dirt.
This implies that the volume of the dirt in the large hill took the shape of a truncated cone.
Her estimate then includes:
a base diameter = 80 feet ; then the base raidus (R) = 80 feet/2 = 40 feet
a top diameter = 40 feet ; then the top radius (r) = 40 feet/2 = 20 feet
a helght = 24 feet.
Using the formula for the volume of a truncated cone :
[tex]V =\dfrac{1}{3} \times \pi \times h \times ( r^2 +r \times R+ R^2)[/tex]
[tex]V =\dfrac{1}{3} \times \pi \times 24 \times ( 20^2 +20 \times 40+ 40^2)[/tex]
[tex]V =25.133 \times ( 400 +20 \times 40+ 1600)[/tex]
V = 70371.675 ft³
V ≅ 70372 ft³
Answer:
70,336
Step-by-step explanation:
5|7 - 9| - 2
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Answer: 8
Step-by-step explanation:
1. 5 * |7-9| - 2
2. 5 * 2 - 2
3. 10 - 2
4. 8
Cora and Cameron are at a pool Carl dives in and touches the bottom of the pool 15 feet below the surface of the water Cameron is standing on a diving platform 2 feet above the service waiting for his turn what is the vertical distance between Carl's and and Cameron's feet
Answer:
17 feet
Step-by-step explanation:
Here, we want to calculate the vertical distance between Carl’s and Cameron’s feet
Since Carl is at the base of the pool, the distance between the water surface and the base of the pool will be 15 feet
We are also told they Cameron is on a diving platform 2 feet above;
So the distance between the two of them will be ;
15 feet + 2 feet = 17 feet