The graph of y=-5x^2 + 9 passes through (1,2a) in the standard (x,y) coordinate plane what is the value of a? .

1 answer:

ella [17]3 years ago

3 0

First you plug everything in to get
2a=-5 (1)^2+9 you do the powers and multiply
2a=-5 (1)+9
2a=-5+9
2a=4
a=2

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luda_lava [24]

$362=300+60+2\\\\4\times362=4\times(300+60+2)\\\\ues\ distributive\ property:\\\\4\times300+4\times60+4\times2=1200+240+8=\boxed{1448}$

3 0

3 years ago

Alex787 [66]

If you mean this one then:
Yes it is a perfect square, since you get a whole number as the original points
And the answer is C

4 0

3 years ago

Anna007 [38]

Answer:

7.87 years

Step-by-step explanation:

#First we determine the effective annual rate based on the 9% compounded semi annual;

$i_m=(1+i/m)^m-1\\\\=(1+0.09/2)^2-1\\\\=0.09203$

#We then use this effective rate in the compound interest formula to solve for n. Given that the principal doubles after 2 yrs:

$A=P(1+i)^n\\\\A=2P, i=i_m\\\\16000=8000(1.09203)^n\\\\2=1.09203^n\\\\n=\frac{log \ 2}{log \ 1.09203}\\\\=7.87324\approx7.87 \ yrs$

Hence, it takes 7.87 years for the principal amount to double.

4 0

3 years ago

Fiesta28 [93]

Answer:

i think its 21/x-4

Step-by-step explanation:

sorry if im wrong

3 0

2 years ago

maw [93]

Answer:

Yes

Step-by-step explanation:

All rational numbers can be fully expressed as a fraction.

In this case, -19/1.

7 0

3 years ago