What is 5x + 5 + 5x = -75

Mathematics

1 answer:

Dafna11 [192]3 years ago

4 0

Answer:

-8

Step-by-step explanation:

first combine like terms 5x+5x=10x

then subtract 5 from -75= -80

divide -80 by 10= -8

you are left with -8=x

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You can use a vector calculator to find the solution, too. Using bearing angles, the sum is
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Distances that are not in the direction of one of the coordinate axes can be translated to rectangular coordinates by
displacement*(cos(angle), sin(angle))
Angles can be measured in the conventional way—from the positive x-axis. A direction of southeast will be +315° or -45°. A direction of southwest will be +225° or -135°.

Then the sum of the displacements in rectangular coordinates is ...
= (7, -3) + 3*(cos(-45°), sin(-45°)) + 4*(cos(-135°), sin(-135°))
= (7, -3) + ((√2)/2)*((3, -3) + (-4, -4))
= (7, -3) + 0.707107*(-1, -7)
= (6.2929, -7.9497)
Then the Pythagorean theorem is used to find the direct distance from home to this displaced location.
d = √(6.2929² +(-7.9497)²) ≈ √102.7990
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