What’s the answer for this question
2 answers:
Answer:
J. 28.
Step-by-step explanation:
Since there are 180 degrees in a triangle the sum of the 2 unknown angles = 180 - 50 = 130, so we have the equation:
2x + 3x - 10 = 130
5x = 140
x = 28.
Answer:
x=28
Step-by-step explanation:
degrees of a triangle is always 180
2x+3x=5x
5x - 10 + 50
5x + 40
180 - 40 = 140
5x = 140
140/5 = 28
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The student would have 18 dimes in the bank.. 54 coins. x+2x+3x=54
6x=54
18 dimes,
9 quarters
27 nickles.
Answer:
GH=15
Step-by-step explanation:
HK= FK/2= 16/2= 8
Using pythagoras theorem in triangle GHK,
GH²= GK²-HK²
= 17²-8²
= 225
GH= √225
=15
Answer:
Step-by-step explanation:
9x⁴ – 2x² – 7 = 0
Let's say that u = x²:
9u² – 2u – 7 = 0
Factor:
(u – 1) (9u + 7) = 0
u = 1, -7/9
Since u = x²:
x² = 1, -7/9
x = ±1, ±i √(7/9)
Alright. (1/4^2)+2((1/4)(2/3)-3(2/3^2)=-.9375 is the correct answer
