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Answer:
The reciprocal of -7/9 is -9/7
Step-by-step explanation:
A reciprocal of a number is the multiplicative inverse of said number. In other words,
The reciprocal of x/y is y/x
Therefore, the reciprocal of -7/9 is -9/7
Answer:
Option D (4, -5)
Step-by-step explanation:
This question can be solved by various methods. I will be using the hit and trial method. I will plug in all the options in the both the given equations and see if they balance simultaneously.
Checking Option 1 by plugging (-4, -5) in the first equation:
-2(-4) + 6(-5) = -38 implies 8 - 30 = -38 (not true).
Checking Option 2 by plugging (-5, 4) in the first equation:
-2(-5) + 6(4) = -38 implies 10 + 24 = -38 (not true).
Checking Option 3 by plugging (1, -6) in the second equation:
3(1) - 4(-6) = 32 implies 3 + 24 = 32 (not true).
Since all the options except Option 4 have been ruled out, therefore, (4,-5) is the correct answer!!!
E = cost of a box of envelopes
N = cost of a box of notebook paper
Answer:
x ≈ 1.6
Step-by-step explanation:
tan37° = =
Multiply both sides by 2.1
2.1 × tan37° = x, thus
x ≈ 1.6 ( to the nearest tenth )