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Evgen [1.6K]
2 years ago
14

Please help I have 5 minutes

Mathematics
1 answer:
aleksley [76]2 years ago
3 0

Answer:

-21.1 and 24.1

Step-by-step explanation:

-8.2*4 + 3.9*3=-21.1

5.1*3 - (-2.2*4)=24.1

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Solve<br> y=2x2-3x-1<br> y=x-3
4vir4ik [10]

Answer:

The value of x is 1 and y = -2

Step-by-step explanation:

y = 2x²- 3x - 1;

y = x - 3

2x²- 3x - 1 = x - 3

2x² - 3x - 1 - x + 3 = 0

2x² - 4x + 2 = 0

take 2 as common

2(x² - 2x + 1) = 0

x² - 2x + 1 = 0

x² - x - x + 1 = 0

x(x - 1) - 1(x - 1) = 0

(x - 1) (x - 1) = 0

x - 1 = 0 or x - 1 = 0

x = 1 or x = 1

Now,

y = x - 3

y = 1 - 3

y = - 2

Thus, The value of x is 1 and y is -2

<u>-TheUnknown</u><u>Scientist</u>

4 0
2 years ago
Six more than three times a number is less than or equal to 69
Reika [66]
The answer would be less. Hope this helps. :)
5 0
3 years ago
James <br><br> Batches of brownie
oksano4ka [1.4K]

Answer:

Step-by-step explanation:

4 0
2 years ago
Help help help help it is little simple​
notsponge [240]

3<em>x</em> ² - 2<em>x</em> + 1 = 2<em>x</em> ² - 3<em>x</em> + 7

<em>x</em> ² + <em>x</em> - 6 = 0

(<em>x</em> + 3) (<em>x</em> - 2) = 0

<em>x</em> + 3 = 0   <u>or</u>   <em>x</em> - 2 = 0

<em>x</em> = -3   <u>or</u>   <em>x</em> = 2

6 0
3 years ago
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A mans weekly wage was £336 but now he earns £420. what is the percentage change
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