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lord [1]
3 years ago
10

Describe two methods for adding and subtracting linear expressions

Mathematics
1 answer:
otez555 [7]3 years ago
8 0
Three main methods come to mind: Substitution method, Elimination method, Matrix row-reduction.The first two methods are taught in early grades in most high schools. Matrix row-reduction is taught in senior years in high school, or more likely, in the early years of a university math or science program. 
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4x - 3 = 6x + 9 linear equations
deff fn [24]
First, we have to get the variable to one side of the equation, which can be done with simple subtraction.

4x -3 (-6x) = 6x + 9 (-6x)
-2x -3 = 9

now just solve as a regular equation:
-2x - 3 = 9
-2x = 12
x = -6

so, x is equal to -6
8 0
2 years ago
A rectangular prism has a length of 3 1/2 inches a width of 5 inches height of 1 1/2 inches what is the volume for the prism?
IgorLugansk [536]

Answer:

Thanks for asking!

Step-by-step explanation:

The volume of the prisim is 26.25

8 0
2 years ago
How can you write the expressiHow can you write the expression 7(b – 2) in words?
OleMash [197]

Answer:

E.

the product of seven and the difference of b minus two

5 0
3 years ago
Read 2 more answers
Several years​ ago, 43​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r
Ne4ueva [31]
<h2><u>Answer with explanation</u>:</h2>

Let p be the population proportion of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive.

Set of hypothesis :

H_0: p=0.43\\\\ H_a:p\neq0.43

Confidence interval for population proportion is given by :-

\hat{p}\pm z_c\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}} , where

n= sample size

\hat{p}= sample proportion

and z_c is the two-tailed z-value for confidence level (c).

As per given ,

Sample size of parents : n= 1085

Number of parents indicated that they were satisfied= 466

Sample proportion :  \hat{p}=\dfrac{466}{1085}\approx0.429

Critical value for 90​% confidence interval : z_c=1.645  ( by z-value table)

Now, the  90​% confidence interval :

0.429\pm (1.645)\sqrt{\dfrac{0.429(1-0.429)}{1085}}\\\\=0.429\pm 0.0247\\\\=(0.429-0.0247,\ 0.429+0.0247)\\\\=(0.4043,\ 0.4537)

Thus , the 90​% confidence interval: (0.4043, 0.4537).

Since 0.43 lies in 90​% confidence interval , it means we do not  have enough evidence to reject the null hypothesis .

i.e. We are have no evidence that parents' attitudes toward the quality of education have changed.

3 0
3 years ago
What is 829 rounded to the nearest ten
Allisa [31]
829 is rounded to 830 because the 9 is greater than 4 so its going to be rounded up.
8 0
2 years ago
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