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2 years ago

Can someone pls help for brainlest

Mathematics

1 answer:

Fiesta28 [93]2 years ago

3 0

1. Two $5 bills have the same value as one $10 bill

2. Four $5 bills have the same value as one $20 bill

3. Twenty $5 bills have the same value as one $100 bill

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Please solve this, i will mark brainliest

Anton [14]

Answer:

$k=-2$

Step-by-step explanation:

Let's write the left hand side as a negative power, and 9 as a power of 3:

$3^-^k=3^2$ At this point, for the equality to still stand, the exponents have to be equal:

$-k = 2 \rightarrow k=-2$

7 0

2 years ago

Read 2 more answers

As an estimation we are told 5 miles is 8 km.

melamori03 [73]

Answer:

Step-by-step explanation:

52.5 mi(8 km/5mi) = 84 km

3 0

2 years ago

Alvin's age is two times Elga's age. The sum of their ages is 33. What is Elga's age?

Marina CMI [18]

Answer:Elga is 11 because 3 times 11 = 33.

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Solve the initial value problems:<br> 1/θ(dy/dθ) = ysinθ/(y^2 + 1); subject to y(pi) = 1

ladessa [460]

Answer:

$-\theta cos\thsta+sin\theta = \frac{y^{2} }{2} + ln y + \pi - \frac{1}{2}$

Step-by-step explanation:

Given the initial value problem $\frac{1}{\theta}(\frac{dy}{d\theta} ) =\frac{ ysin\theta}{y^{2}+1 } \\$ subject to y(π) = 1. To solve this we will use the variable separable method.

Step 1: Separate the variables;

$\frac{1}{\theta}(\frac{dy}{d\theta} ) =\frac{ ysin\theta}{y^{2}+1 } \\\frac{1}{\theta}(\frac{dy}{sin\theta d\theta} ) =\frac{ y}{y^{2}+1 } \\\frac{1}{\theta}(\frac{1}{sin\theta d\theta} ) = \frac{ y}{dy(y^{2}+1 )} \\\\\theta sin\theta d\theta = \frac{ (y^{2}+1)dy}{y} \\integrating\ both \ sides\\\int\limits \theta sin\theta d\theta =\int\limits \frac{ (y^{2}+1)dy}{y} \\-\theta cos\theta - \int\limits (-cos\theta)d\theta = \int\limits ydy + \int\limits \frac{dy}{y}$

$-\theta cos\thsta+sin\theta = \frac{y^{2} }{2} + ln y +C\\Given \ the\ condition\ y(\pi ) = 1\\-\pi cos\pi +sin\pi = \frac{1^{2} }{2} + ln 1 +C\\\\\pi + 0 = \frac{1}{2}+ C \\C = \pi - \frac{1}{2}$

The solution to the initial value problem will be;

$-\theta cos\thsta+sin\theta = \frac{y^{2} }{2} + ln y + \pi - \frac{1}{2}$

5 0

2 years ago

Please answer this question

Semmy [17]

Answer: -3x + 15

Step-by-step explanation: you multiply -3 by x so you get -3x, then you multiply -3 by -5 and get +15, then you just put the two together in an equation.

4 0

2 years ago