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2 years ago

This is 6th grade work there will be more questions on this but i needed help on this

Mathematics

2 answers:

sweet-ann [11.9K]2 years ago

6 0

His awnswers true so ummmmmmmmm yeah

nata0808 [166]2 years ago

3 0

Answer:

Step-by-step explanation:

X + (X + 4) + (X - 7) = 54

3X - 3 = 54

3X - 3 + 3 = 54 + 3

3X = 57

3X / 3 = 57 / 3

X = 19

Y = (19 + 4) = 23

Z = (19 - 7) = 12

Sam's age = 19

Dana's age = 23

Alex's age = 12

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Step-by-step explanation:

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OLga [1]

Answer:

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Step-by-step explanation:

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2 years ago

In ΔWXY, the measure of ∠Y=90°, XW = 85, WY = 84, and YX = 13. What is the value of the cosine of ∠W to the nearest hundredth?

IgorLugansk [536]

Answer: 0.99

Step-by-step explanation:

SOH CAH TOA

CAH: cosine = adjacent/hypotenuse

Cosine of angle w = 84/85 = 0.98823 ≈ 0.99

Angle Y is 90 degrees, meaning it's a right triangle. Therefore angle W is the top/tip of a triangle, while X is the angle next to Y. If you plug in the information afterwards and follow the trigonometry rule (SOH CAH TOA) you will find your answer.

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3 years ago