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3 years ago

Is (-5,6) a solution for 4x + 3y = 9

Mathematics

2 answers:

Airida [17]3 years ago

8 0

Answer:

Nope

Step-by-step explanation:

Insert (-5,6) to the problem:

4(-5) + 3(6) = 9

-20 + 18 = 9

-2 = 9

(-5,6) is not the solution.

ozzi3 years ago

5 0

Answer:

No.

Step-by-step explanation:

Insert the x and y, (-5 is x and 6 is y) into the equation. It should look like 4(-5)+3(6)=9. 4(-5)=-20 and 3(6)=18. -20+18=2 not 9.

(hope this helps :P)

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andre [41]

Answer:

Step-by-step explanation:

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3 years ago

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denis23 [38]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Two cables support a 800-lb weight, as shown. Find the tension in each cable.

jeka94

Answer:

892 lb (right)
653 lb (left)

Step-by-step explanation:

The weight is in equilibrium, so the net force on it is zero. If R and L represent the tensions in the Right and Left cables, respectively ...

Rcos(45°) +Lcos(75°) = 800

Rsin(45°) -Lsin(75°) = 0

Solving these equations by Cramer's Rule, we get ...

R = 800sin(75°)/(cos(75°)sin(45°) +cos(45°)sin(75°))

= 800sin(75°)/sin(120°) ≈ 892 . . . pounds

L = 800sin(45°)/sin(120°) ≈ 653 . . . pounds

The tension in the right cable is about 892 pounds; about 653 pounds in the left cable.

_____

This suggests a really simple generic solution. For angle α on the right and β on the left and weight w, the tensions (right, left) are ...

(right, left) = w/sin(α+β)×(sin(β), sin(α))

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3 years ago

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AnnyKZ [126]

m = 3√2√2

= 6

n = a

= 3√2

Answer =  D) m = 6 , n = 3√2

m = n = a

m = 3

n = 3

Answer = A

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2 years ago