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2 years ago

One half of the sum of r and 2

Mathematics

1 answer:

hjlf2 years ago

8 0

(r + 2) ÷ 1/2

Hope this helps you

Brainliest would be appreciated!

-AaronWiseIsBae

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A number is multiplied by 4. That result is added to 12. The final number is 40.

NARA [144]

Answer:

B) 7

Step-by-step explanation:

Let the number be x

4x + 12 = 40

4x = 40 -12

4x =28

x = 28/4

x = 7

5 0

2 years ago

Robyn bought 2 yards of cotton fabric and yards of fleece fabric. How many yards of fabric did Robyn buy?

Vinil7 [7]

Here, Cotton fabric = 2 yards
yards of fleece fabric = 2 1/2 yards

Total fabric = 2 + 2 1/2 = 4 1/2

In short, Your Answer would be: Option C

Hope this helps!

3 0

2 years ago

Find a homogeneous linear differential equation with constant coefficients whose general solution is given by

frez [133]

Answer:

$y" + 2y' + 2y = 0$

Step-by-step explanation:

Given

$y=c_1e^{-x}cosx+c_2e^{-x}sinx$

Required

Determine a homogeneous linear differential equation

Rewrite the expression as:

$y=c_1e^{\alpha x}cos(\beta x)+c_2e^{\alpha x}sin(\beta x)$

Where

$\alpha = -1$ and $\beta = 1$

For a homogeneous linear differential equation, the repeated value m is given as:

$m = \alpha \± \beta i$

Substitute values for $\alpha$ and $\beta$

$m = -1 \± 1*i$

$m = -1 \± i$

Add 1 to both sides

$m +1= 1 -1 \± i$

$m +1= \± i$

Square both sides

$(m +1)^2= (\± i)^2$

$m^2 + m + m + 1 = i^2$

$m^2 + 2m + 1 = i^2$

In complex numbers:

$i^2 = -1$

So, the expression becomes:

$m^2 + 2m + 1 = -1$

Add 1 to both sides

$m^2 + 2m + 1 +1= -1+1$

$m^2 + 2m + 2= 0$

This corresponds to the homogeneous linear differential equation

$y" + 2y' + 2y = 0$

6 0

3 years ago

What is the point estimate for the number of cars sold per week for a sample consisting of the following weeks: 1, 3, 5, 7, 10,

Eva8 [605]

The point esimate I think would be 10

8 0

1 year ago

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

SpyIntel [72]

Answer:

Step-by-step explanation:

${3x}^{2} - 2y \\ 3 { \times 3}^{2} - 2 \times 5 \\ 27 - 10 = 17$

${2x}^{2} - 3y \\ 2 \times {3}^{2} - 3 \times 5 \\ 12 - 15 = - 3$

$17 - 3 = 14$

7 0

2 years ago

Read 2 more answers