Simplify the expression by removing symbols of grouping and combining like terms.3(r − 4s) − 5(3r − 5s)
Answers
Step-by-step explanation:
the answer is -12r+13s
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There are twenty classes at each of two middle schools. The number of students in each class at each school is shown in the dot plots below.Number of Students in Each Class at Poplar Middle SchoolA dot plot. A number line going from 20 to 29 labeled Number of Students. There are 3 dots above 20, 5 above 21, 7 above 22, 4 above 23, 1 above 24, and 0 above 25, 26, 27, 28, and 29.Number of Students in Each Class at Oak Middle SchoolA dot plot. A number line going from 20 to 29 labeled Number of Students. There is 1 dot above 20, 2 above 21, 2 above 22, 4 above 23, 3 above 24, 2 above 25, 2 above 26, 2 above 27, 1 above 28, and 1 above 29.Which statement correctly compares the mean number of students for the data in the plots?There are about 2 more students in each class at Poplar Middle School than at Oak Middle School.There are about 2 more students in each class at Oak Middle School than at Poplar Middle School.There are about 5 more students in each class at Poplar Middle School than at Oak Middle School.There are about 5 more students in each class at Oak Middle School than at Poplar Middle School.
Use, <, >, = to compare the following decimals.
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Answer:
Hi
Step-by-step explanation:
Good bye. ;) (Stranger-Danger!) :)
Answers
Therefore, the value of x is -4 if A= B and AB= 3x-5 BC= 5x-6 and AC = 2x-9.
What is equation?
An equation is a mathematical statement that shows the equality of two expressions. It is composed of two sides, separated by an equals sign (=), indicating that the two sides are equivalent in value. An equation may contain variables, which are unknown values represented by letters, as well as constants, which are known values. Equations are used in many areas of mathematics and science to model and solve problems. For example, the equation y = mx + b is a linear equation that describes the relationship between the variables x and y in a straight line, where m is the slope of the line and b is the y-intercept. Equations can be solved by manipulating the variables and using mathematical operations to isolate the unknown value.
Here,
Since A = B, we know that AB = B². So, we can rewrite the equation AB = 3x - 5 as B² = 3x - 5.
Similarly, we can rewrite BC = 5x - 6 as B² = 5x - 6, and AC = 2x - 9 as A² - B² = (2x - 9) - (B^2).
Since we know that A = B, we can substitute B for A in the last equation to get:
B² - B² = (2x - 9) - (B²)
Simplifying this equation, we get:
0 = 2x - 9 - B²
Now we can substitute the equation B² = 3x - 5 into the above equation to get:
0 = 2x - 9 - (3x - 5)
Simplifying this equation, we get:
0 = -x - 4
Solving for x, we get:
x = -4
To know more about equation,
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Line2: 4x+10y=8
Line3: y=5/2x-4
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Answer: Lines 1 &3 are parallel with each other and line 2 is neither
Step-by-step explanation:
After singling out y for lines 1 & 2 you see they have the same slope 5/2 x
But for the second line it intersects worth both lines but does not make a 90 degree angle
Select ALL OF THE correct answers.
A. 1
B. 2
C. 3
D. 4
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You may solve this problem in two ways:
If you solve the inequality explicitly (divide both sides by 4), you get
So, if has to be stricktly less than 4, you can only choose 1, 2 and 3 as answers.
Alternatively, you can plug in all of the values you're proposed and check if the inequality holds:
If , you have
, which is true.
If , you have
, which is true.
If , you have
, which is true.
If , you have
, which is false.
So, again, only 1, 2 and 3 are solutions.
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Step-by-step explanation:
since x=4 is a vertical line,there is no y-intercerpt and the slope is undefined.
B.-3
C.0
D.12
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9514 1404 393
Answer:
D. 12
Step-by-step explanation:
Set x=0 and solve for y.
0 -1/2y = -6
y = (-2)(-6) = 12 . . . . . . multiply by -2 to clear the fraction
The y-intercept is 12.