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2 years ago

Evaluate −x^2−5 y^3 when x = 4 and y = 1

Mathematics

2 answers:

Natali [406]2 years ago

4 0

Answer:

Simplify:

$-4^2-5(1^3)$

So you get:

$-21\\$

Papessa [141]2 years ago

4 0

Answer:

$\huge\boxed{-21}$

Step-by-step explanation:

-x²-5y³

Given that x = 4, y = 1

$-(4)^2-5(1)^3$

$-16-5(1)\\-16-5\\-21$

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The price of a television before tax is $1625.00. The total price with tax is $1,803.75. What is the rate of the sales tax?

Oksanka [162]

Answer:

11%

Step-by-step explanation:

A sales tax is placed on goods and services once the buyer and seller agree on what the exchange of currency is.

In this case you take the tax on the 1625 and not the 1803.75.

The buyer agreed to buy the item for 1625 and the seller agreed to sell it for that amount. So the tax goes on 1625.

Tax amount = total price - selling price

Tax amount = 1803.75 - 1625

Tax amount = 178.75

That's not what you want. You want the % of the tax.

% Tax = (Tax Amount / Selling Price) * 100

% Tax = (178.75 / 1625) * 100

% Tax = 0.11 * 100

% Tax = 11% Answer

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3 years ago

What is forty nine eight hundred and one ten thousands in a decimal

GREYUIT [131]

Answer:, 49.010000.

Step-by-step explanation:

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2 years ago

Find the volume of the region bounded above by the elliptical paraboloid zequals=9 minus 4 x squared minus 5 y squared9−4x2−5y2

Virty [35]

Answer:

$\int\limits^1_0 \int^1_0{z} \, dA$

Step-by-step explanation:

$\int\limits^1_0\int^1_0 {9-4x^2-5y^2dy} \, dx$

$\int\limits^1_0 {9y-4x^2y-\frac{5y^3}{3}|_0 ^1 } \, dx$

$\int\limits^1_0 {22/3 -4x^2} \, dx$

You finish the leftover.

7 0

3 years ago

Consider the polynomial p(x) = x^3 + 4x^2 + 6x − 36.

Nady [450]

Answer:

a. attached graph; zero real: 2

b. p(x) = (x - 2)(x + 3 + 3i)(x + 3 - 3i)

c. the solutions are 2, -3-3i and -3+3i

Step-by-step explanation:

p(x) = x³ + 4x² + 6x - 36

a. Through the graph, we can see that 2 is a real zero of the polynomial p. We can also use the Rational Roots Test.

p(2) = 2³ + 4.2² + 6.2 - 36 = 8 + 16 + 12 - 36 = 0

b. Now, we can use Briott-Ruffini to find the other roots and write p as a product of linear factors.

2 | 1 4 6 -36

1 6 18 0

x² + 6x + 18 = 0

Δ = 6² - 4.1.18 = 36 - 72 = -36 = 36i²

√Δ = 6i

x = -6±6i/2 = 2(-3±3i)/2

x' = -3-3i

x" = -3+3i

p(x) = (x - 2)(x + 3 + 3i)(x + 3 - 3i)

c. the solutions are 2, -3-3i and -3+3i

4 0

2 years ago

What is t + 0.03t in simplest form?

romanna [79]

That particular binomial expression can be simplified to . . . . . <em>1.03 t</em>

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2 years ago