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3 years ago

What is a valid card number for a MasterCard? A) 4224 1801 2345 6781

Mathematics

1 answer:

mart [117]3 years ago

6 0

Answer:

please mark me brainliest

Step-by-step explanation:

Mastercard cards – Begin with a 5 and has 16 digits. American Express cards – Begin with a 3, followed by a 4 or a 7 has 15 digits. Discover cards – Begin with a 6 and have 16 digits. Diners Club and Carte Blanche cards – Begin with a 3, followed by a 0, 6, or 8 and have 14 digits.

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PLZ HELP ill GIVE BRAINIESt!!!!32 Points

NISA [10]

We are given 2 points with there coordinates easy to calculate:

the upper one A(1,15) & the lower one B(6,10). Moreover the equation of this linear function is y = mx + b

1st) calculate m= (10-15) / (6-1) [FOMULA m=(y₂ - y₁) / (x₂ - x₁)]

m= -5/5 ==> m= - 1==> y=-x + b. To calculate b, replace x & y by any of the 2 points A, B. Say A(1,15)

15 = - (1) + b ==> b= 16 & final equation y = -x +16

3 0

3 years ago

Read 2 more answers

What is the largest flag jake can draw

alexgriva [62]

The ratio of length to width is 3/2. Let's set up equations of ratios using first the 25 cm length of the paper and then the 20 cm width:

3 25 cm
--- = ----------
2 x

Solving for x, 3x = 50 cm, and x =16 2/3 cm. This is possible, since 16 2/3 is less than the paper width 20 cm.

3 20 cm
--- = -----------
2 x

Solving for x: 3x = 40 cm; x = 40/3 cm, or x= 13 1/3 cm. This is possible, but does not make maximum use of the 20 by 30 cm paper.

Answer: the largest flag Jake can draw on the paper given is 20 cm (length) by 16 2/3 cm.

5 0

3 years ago

What is the equations for f(x)?

Wittaler [7]

$f(x) = -8\cdot 4^x$

You reflect a function with respect to the $x$ axis by changing its sign.

In fact, if you consider the two alternatives

$x \mapsto f(x)$ and $x \mapsto -f(x)$

you can see that you're choosing opposite outputs for the same inputs.

In other words, one graph will be made of points like $(x,f(x))$ , the other of points like $(x,-f(x))$

And the transformation

$(x,y) \to (x,-y)$

is exactly a reflection with respect to the $x$ axis.

6 0

3 years ago

Please help with this AP Calculus question !

melomori [17]

Answer:

C. $\displaystyle \frac{cos(x)}{x} - ln(x)sin(x)$

General Formulas and Concepts:

Calculus

Differentiation

Derivatives
Derivative Notation

Derivative Rule [Product Rule]: $\displaystyle \frac{d}{dx} [f(x)g(x)]=f'(x)g(x) + g'(x)f(x)$

Trig Derivatives

Logarithmic Derivatives

Step-by-step explanation:

Step 1: Define

Identify

$\displaystyle f(x) = ln(x)cos(x)$

Step 2: Differentiate

Derivative Rule [Product Rule]: $\displaystyle f'(x) = \frac{d}{dx}[ln(x)]cos(x) + ln(x)\frac{d}{dx}[cos(x)]$
Logarithmic Derivative: $\displaystyle f'(x) = \frac{1}{x}cos(x) + ln(x)\frac{d}{dx}[cos(x)]$
Trig Derivative: $\displaystyle f'(x) = \frac{1}{x}cos(x) + ln(x)[-sin(x)]$
Simplify: $\displaystyle f'(x) = \frac{cos(x)}{x} - ln(x)sin(x)$

Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

Book: College Calculus 10e

7 0

3 years ago

Help me plz math (picture)

skad [1K]

For 34, since each diameter is in scientific notation , meaning that we have one number (1-9) followed by a decimal, we simply see which has the smallest power, which is cell C.

For 35, we multiply them out to get 0.83*10^2 (we subtract exponents when dividing). Since scientific notation is one integer from 1-9 followed by a decimal, we move 0.83 one place to the right and therefore remove one power from 10^2, getting 8.3*10

6 0

3 years ago