Interest = Pin = principal * interest rate * number of years

Let interest rate be i, then
600*i*2+150*i*4=90
1200i+600i = 90
i=90/(1200+600)=90/1800=1/20=0.05 or 5%

8 0

2 years ago

Math test pls help me

Natalija [7]

Answer:

D. $\frac{45}{x^{10}}$

Step-by-step explanation:

$(3 {x}^{ - 4} )^{2} (5 {x}^{ - 2} ) \\ \\ = (9 {x}^{ - 8} )(5 {x}^{ - 2} ) \\ \\ = 9 \times 5 \times {x}^{ - 8 - 2} \\ \\ = 45 {x}^{ - 10} \\ \\ = \frac{45}{ {x}^{10} }$

3 0

2 years ago

Can someone plz help thxs

emmasim [6.3K]

Sheeeeeeessssssshhhhhhhh

4 0

3 years ago

How can I factor -2x^2+2x+4=0 ?

Shtirlitz [24]

Because all are a multiple of 2, you can factor out 2, 2(-x^2+x+2)=0

4 0

2 years ago