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3 years ago

0.9x + 2.3x = -6.4I don't understand this lol

Mathematics

2 answers:

faltersainse [42]3 years ago

5 0

Answer: Solving for x

Step-by-step explanation:

First add the known variables. This gets you 3.2

Next, since you know that multiplication is used to find 6.4 we take the inverse. 6.4/3.2

To get 2.

And finally, check you work.Fill in the x value and substitute for x. .9(2) + 2.3(2) to make sure your division is correct.

Hope this helps!!

marissa [1.9K]3 years ago

3 0

Answer:

-2

Step-by-step explanation:

0.9x + 2.3x = -6.4

3.2x = -6.4

x = -2

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In ΔABC, if m∠A = 43° and m∠C = 66°, then find m∠B.

weqwewe [10]

The measures of the angles in a triangle add up to 180°.
$m \angle A + m \angle B + m \angle C = 180^\circ \\
m \angle A=43^\circ, \ m \angle C = 66^\circ \\ \downarrow \\
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3 years ago

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svetlana [45]

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Step-by-step explanation:

Note the definition of a rectangle. All angles must be 90°, and opposite sides are parallel and congruent.

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3 years ago

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d1i1m1o1n [39]

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4 years ago

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Lady bird [3.3K]

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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4 years ago

0.9x + 2.3x = -6.4I don't understand this lol​

0.9x + 2.3x = -6.4I don't understand this lol