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prisoha [69]
3 years ago
5

-4x+8y=-256 -6y = x. how do u solve this equation by substitution.

Mathematics
1 answer:
serious [3.7K]3 years ago
4 0
To make it soo much easier, divide top equation by 4
-x+2y=-64

now
-6y=x
sub -6y for x
-(-6y)+2y=-64
6y+2y=-64
8y=-64
divide both sides by 8
y=-8

sub back
-6y=x
-6(-8)=x
48=x

x=48
y=-8
(x,y)
(48,-8)
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Answer:

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5 0
3 years ago
The polynomial below is NOT in standard form: - 4 + 7x² + 3x Rearrange the terms so that the polynomial is in standard form: Sub
dangina [55]

Answer:

answer maybe x^2 + 3x - 28

explanation

first of all this is how any number of such a kind shud be written

ax^2 + bx + c

so that rearrange it

7x^2 + 3x -4

but I personally would go further to put it like this

x^2 + 3x - 28

both answers are the same so but maybe one is more considered since ur qn requires standard form

in case of any misunderstanding plizzz reach out for further explanation

hope this helps

6 0
3 years ago
which of the following correlation coefficients is indicative of the strongest relationship between the two variables
VladimirAG [237]

The strongest linear relationship of correlation coefficient is a -1 or 1.

According to the statement

we have given that the cases and the out of these we have to ensure that which case show the correlation coefficients is indicative of the strongest relationship between the two variables

So, For this purpose

The relationship of correlation coefficient  is a statistical measure that calculates the strength of the relationship between the relative movements of two variables.

And according to the given cases

The strongest linear relationship is indicated by a correlation coefficient of -1 or 1.

The weakest linear relationship is indicated by a correlation coefficient equal to 0. A positive correlation means that if one variable gets bigger, the other variable tends to get bigger.

So, The strongest linear relationship of correlation coefficient is a -1 or 1.

Learn more about relationship of correlation coefficient here brainly.com/question/4219149

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6 0
2 years ago
Evaluate each expression if a = 6, b = 3, and c = 2.
cricket20 [7]

Answer:

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7 0
4 years ago
What is the reason: if a+c=b+c then a=b
Tomtit [17]

Step-by-step explanation:

Example 1:

a+c=b+c then a=b

First let the value of a and b be different (not equal)

a=5

b=7

c=10

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5+10=7+10

15≠17

Example 2:

Let the value a and b be equal (the same)

a=5

b=5

c=10

a+c=b+c

5+10=5+10

15=15

So when,

a+c and b+c is equal, a and b are <u>always</u><u> </u> equal.

Hope this helps ;) ❤❤❤

8 0
3 years ago
Read 2 more answers
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