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Molodets [167]
3 years ago
9

Given 2x² = -8, x isa. -2b. 2c. 2i or -2id. 4i or -4i

Mathematics
1 answer:
marishachu [46]3 years ago
5 0
Your answer is (a) because 4 times 2 is 8 but since it's negative 2 it's negative 8

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Prove (1+sin/csc-cot)-(1-sin/csc+cot)=2(1+cot)​
Aloiza [94]

\dfrac{1+sin}{csc-cot}-\dfrac{1-sin}{csc+cot}=2(1+cot)\\\\\\\text{Proof from LHS }\rightarrow \text{ RHS}\\\\\dfrac{1+sin}{csc-cot}\bigg(\dfrac{csc+cot}{csc+cot}\bigg)-\dfrac{1-sin}{csc+cot}\bigg(\dfrac{csc-cot}{csc-cot}\bigg)\\\\\\\dfrac{csc+cot+sin csc+sincot}{csc^2-cot^2}+\dfrac{-csc+cot+sincsc-sincot}{csc^2-cot^2}\\\\\\\dfrac{2cot+2sincsc}{csc^2-cot^2}\\\\\\\dfrac{2(cot+sincsc)}{1}\\\\\\2\bigg(\dfrac{cos}{sin}+\dfrac{sin\cdot1}{sin}\bigg)\\\\\\2(cot+1)\\\\\\2(1+cot)=2(1+cot)

LHS = RHS \checkmark

3 0
3 years ago
If lulu equals 6, julie equals 15, joe equals 15 and jill equals 12, what number is each letter worth
Ede4ka [16]
In Lulu, each letter is worth 1.5.

In Julie, each letter is worth 3.

In Joe, each letter is worth 5.

In Jill, each letter equals 3.


Hope this helps! :)


6 0
4 years ago
To which of the following sets of numbers does ⅞ belong?
artcher [175]

Answer:

A. Rational number

Step-by-step explanation:

It is not a whole number or integer because it's a fraction. so it's the rational of a whole number.

7 0
3 years ago
Write an algebraic expression of 15 decreased by two times p
OLEGan [10]
''Decreased'' means subtract and ''times'' means multiplication so the algebraic expression should be 15 - 2 * p.
5 0
4 years ago
Read 2 more answers
Yvette is considering taking out a loan with a principal of $16,200 from one of two banks. Bank F charges an interest rate of 5.
umka21 [38]
Hi there
First find the monthly payment of each offer to see which monthly payment is lower
The formula of the present value of annuity ordinary is
Pv=pmt [(1-(1+r/k)^(-kn))÷(r/k)]
Pv present value
PMT monthly payment
R interest rate
K compounded monthly 12
N time
Solve the formula for PMT
PMT=pv÷[(1-(1+r/k)^(-kn))÷(r/k)]

Bank F
PMT=16,200÷((1−(1+0.057÷12)^(
−12×8))÷(0.057÷12))
=210.53

Bank G
PMT=16,200÷((1−(1+0.062÷12)^(
−12×7))÷(0.062÷12))
=238.21

From the above the monthly payment of bank f is lower than the bank g
And since the lifetime of bank g is lower than bank f the answer is
b. Yvette should choose Bank F’s loan if she cares more about lower monthly payments, and she should choose Bank G’s loan if she cares more about the lowest lifetime cost.

Good luck!


6 0
3 years ago
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