limelight11
26.06.2019 •
Mathematics
Me with this geometry question image attached
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Ответ:
Third answer choice is correct: 8/17
Step-by-step explanation:
You have to know the "parts" of the triangle: three angles, A B & C + three sides, labelled with measures 8, 15 & 17
Also, this is a right triangle (90 degree angle in the bottom left corner)
Also, since you're asked about angle A in the question (it asks What is the ratio of cosA), you have to know that the "8" side is adjacent to angle A and the "17" side is the hypotenuse (hypotenuse is always opposite the 90 degree angle)
Finally, with the mnemonic SOH-CAH-TOA (to help you remember how to find sin, cos & tan), you know the ratio of the cosine of angle A (cosA) is Adjacent over Hypotenuse or 8 over 17 (the fraction 8/17)
Ответ:
a) 11550
b)35%
Step-by-step explanation:
Hi, to answer this question, first, we have to multiply the stadium capacity by the percentage in decimal form (75/100)
a)15400 x (75/100) = 11,550
For b), we know that 15400 is the 100% of the capacity, so, for 20790 the percentage will be:
15400/100= 20790/x
Solving for x
x= 20790 / 154
x= 135%
135%-100% = 35%
The percentage increase in the number of seats will be 35%