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meriva
3 years ago
10

How do u solve 1×-2y=4 -1×+10y=8

Mathematics
1 answer:
Molodets [167]3 years ago
6 0

Answer: x = -8 ; y = -6

Step-by-step explanation:

1*x-2*y=4

1*x = 4 + 2*y

x = 4 + 2*y

Now you replace the value of x on the following equation:

-1*x+10*y=8

-1*(4 + 2*y) = 8

-4 - 2*y = 8

-2*y = 8+4

-2*y = 12

y = -12/2

y = -6

You replace the value of y in the previous equation:

x = 4 + 2*y

x = 4 + 2*(-6)

x = 4 - 12

x = -8

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Given that g(x)=3x²-5x+7 find the following: <br> g(-x)
AURORKA [14]
G(x) = 3x² - 5x + 7
g(-x) = -(3x² - 5x + 7)
g(-x) = -3x² + 5x - 7

This equation cannot be solved because of a few reasons,

1. This equation didn't show that it equals to 0.
2. Even if it equals to zero, square root of a negative number cannot be solved.
(I will show you what I mean)

-3x² + 5x - 7
is the same as
3x² - 5x + 7
by shifting the equation,

for example,
1 - 3 = -2
shifting other side
2 = -1 + 3

using 3x² - 5x + 7 to solve,

Solve\ using\ the\ formular\ \ \boxed{ x= { \frac{-b \pm \sqrt{b^2-4ac} }{2a} } }
a = 3
b = -5
c = 7
x= { \frac {-(-5) \pm \sqrt{ (-5)^2-4(3)(7) } }{2(3)} }
x= { \frac {5 \pm \sqrt{-59} }{6} }

∴This equation cannot be solved.
5 0
3 years ago
Write the slope-intercept form of a linear equation given the slope and y-intercept. Slope : y – intercept: -3​
Alexxx [7]

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Step-by-step explanation:

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7 0
2 years ago
6+x^2)^2. Please solve for me
goldfiish [28.3K]

Answer:

<h2>36 + x^4</h2>

Step-by-step explanation:

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Hope that helps!

6 0
3 years ago
Evaluate the following(21÷7)+7+7(7-2)×9​
san4es73 [151]

Answer:

325

Step-by-step explanation:

Writing out the equation always makes it easier to solve:

( 21 / 7 ) + 7 + 7( 7 - 2 ) x 9

First, following the rules of P.E.M.D.A.S.

(parenthesis, exponents, multiplication, division, addition, subtraction.)

You would need to solve for the values within each parenthesis... so

(21 / 7). 21 divided by 7 is equal to 3. And in (7 - 2). 7 minus 2 is equal to 5.

The equation is now:

( 3 ) + 7 + 7( 5 ) x 9

Next you must solve for multiplication, so:

7( 5 ), 7 times 5 is 35. the equation is now:

( 3 ) + 7 + ( 35 ) x 9

Then, 35 x 9 is equal to 315. The equation is now:

( 3 ) + 7 + 315.

If you add everything together, you get the answer of:

325!!!

5 0
2 years ago
You roll a fair 6-sided die. What is the probability of rolling an even number or a number less than 4?
alukav5142 [94]

Is it 5/6? I remember i took a quiz with this kind of question but I'm not sure


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