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3 years ago

Ten times the square of a nonzero number is equal to forty times the number. what is the number?

1 answer:

5 0

For the answer to the question, what is tTen times the square of a nonzero number is equal to forty times the number10∗x2=40xthe question's statementx2−4x=0simplifyx(x−4)=0factor out an x x=0,x=4 the two solutions

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Which symbol correctly compares these fractions? −4/5 −8/9

mrs_skeptik [129]

Answer:

" > "

Step-by-step explanation:

-4/5=4x9 5×9

-4/5 = - 36/ 45

-8/9=8×5 9×5

-8/9 =-40/45

-36/ 45 > -40/45

-4/5 > -8/9

in this case - 4/5 is closer to 0

4 0

1 year ago

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This is for a Math test plz help me

Mrac [35]

Answer:

Step-by-step explanation:

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3 years ago

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Jen invested $3500 into a continuously compounded account with an interest rate of 3.1%. After 9 years, how much money is in the

GarryVolchara [31]

Answer:

≈$4607

Step-by-step explanation:

I will assume it's compounded yearly.

Apply the compound interest formula.

$A=P(1+\frac{r}{n})^{nt}$

A = Total

P = Initial Principle

r = Interest Rate

n = number of interest in every t period

t = number of periods

In the case,

P = 3500

r = 3.1% = 0.031

n = 1

t = 9

Hence,

$A=3500(1+\frac{0.031}{1})^{1*9}$

$A = 4606.764717......$

A ≈ 4607 (nearest whole number)

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2 years ago

Use the quadratic formula to solve for x. 4x2 +9x-1=0

insens350 [35]

Answer:

$x=\frac{-9\pm\sqrt{65} }{8}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Standard Form: ax² + bx + c = 0
Quadratic Formula: $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

Step-by-step explanation:

Step 1: Define

4x² + 9x - 1 = 0

Step 2: Define variables

a = 4

b = 9

c = -1

Step 3: Find roots

Substitute: $x=\frac{-9\pm\sqrt{9^2-4(4)(-1)} }{2(4)}$
Exponents: $x=\frac{-9\pm\sqrt{81-4(4)(-1)} }{2(4)}$
Multiply: $x=\frac{-9\pm\sqrt{81-16} }{8}$
Subtract: $x=\frac{-9\pm\sqrt{65} }{8}$

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2 years ago

At a book fair a tote bag costs $5 and books cost $3.50 each . You spend a total of $19 before taxes .How many books did you buy

sashaice [31]

4 books . if you do 19-5 that will be 14 and 14 divided by 3.5 will give you 4

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3 years ago

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