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3 years ago

A system of equations is shown below.

1 answer:

5 0

-3x + 7y = -16 . . . (1)
-9x + 5y = 16 . . . .(2)

(1) x 3 => -9x + 21y = -48 . . . (3)
(2) - (3) => -16y = 64 . . . (4)

Required equivalent system of equations is
-9x + 5y = 16
-16y = 64

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How many x intercept appear on the graph of the polynomial function F(x)=x4-5x2

4vir4ik [10]

$f(x)=x^4-5x^2\\\\x^4-5x^2=0\\\\x^2(x^2-5)=0\\\\x^2[x^2-(\sqrt5)^2]=0\\\\x^2(x-\sqrt5)(x+\sqrt5)=0\iff x=0\ \vee\ x=\sqrt5\ \vee\ x=-\sqrt5$

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3 years ago

if you deposit $8000 into an account paying 9% annual interest compunded semi anually how long will it take for your money to do

Anna007 [38]

Answer:

7.87 years

Step-by-step explanation:

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

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

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

4 0

3 years ago

A table is on sale for 26 % off. The sale price is $ 333 . What is the original price?

Svetllana [295]

Answer:

$450

Step-by-step explanation:

The sale price is computed from ...

... sale price = original price - discount

where ...

... discount = (original price) × 26%

Putting these together, we get ...

... sale price = (original price) - 0.26×(original price)

... sale price = (original price) × (1 - 0.26) = 0.74×(original price)

Dividing by 0.74, we find ...

... original price = (sale price)/0.74

... $333/0.74 = $450 = original price

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3 years ago

GEOMETRY

yawa3891 [41]

Answer:

ASA, ASA, SAS, SSS

Step-by-step explanation:

i think this is it

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2 years ago

The length of a quarter is 0.955 inch. Round the length of a quarter to the nearest tenth of an inch

uysha [10]

Answer:

the answer to the question is 0.96.

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3 years ago

Read 2 more answers