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blsea [12.9K]
3 years ago
11

Evaluate 5(x + y) for x = 3 and y = 9. +

Mathematics
1 answer:
Elza [17]3 years ago
5 0

Answer:

60

Work:

3+9=12

12•5=60

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HELP PLEASE!!
matrenka [14]

Answer:

each side is 90 degrees

Step-by-step explanation:

make the brainliest?

3 0
3 years ago
A 20-volt electromotive force is applied to an LR-series circuit in which the inductance is 0.1 henry and the resistance is 30 o
Dafna1 [17]

Answer:

i(t)=(2/3)(1-e^{-300t})

Step-by-step explanation:

Before we even begin it would be very helpful to draw out a simple layout of the circuit. Then we go ahead and apply kirchoffs second law(sum of voltages around a loop must be zero) on the circuit and we obtain the following differential equation,

-V +Ldi/dt+Ri=0

where V is the electromotive force applied to the LR series circuit, Ldi/dt is the voltage drop across the inductor and Ri is the voltage drop across the resistor. we can re write the equation as,

di/dt+Ri/L=V/L

Then we first solve for the homogeneous part given by,

di/dt+Ri/L=0

we obtain,

i(t)_{h} =I_{max}e^{-Rt/L}

This is only the solution to the homogeneous part, The final solution would be given by,

i(t)=i(t)_{h} +c

where c is some constant, we added this because the right side of the primary differential equation has a constant term given by V/R. We put this in the main differential equation and obtain the value of c as c=V/R by comparing the constants on both sides.if we put in our initial condition of i(0)=0, we obtain I_{max} =V/R, so the overall equation becomes,

I(t)=(V/R)(1-e^{-Rt/L})

where if we just plug in the values given in the question we obtain the answer given below,

i(t)=(2/3)(1-e^{-300t})

5 0
4 years ago
Suppose Tommy walks from his home at (0, 0) to the mall at (0, 7), and then walks to a movie theater at (9, 7). After leaving th
Bingel [31]

Answer:

32 blocks

Step-by-step explanation:

distance between home (0,0) and mall (0,7) = 7

distance between mall (0,7) and movies (9,7) = 9

distance between movies (9,7) and store (9,0) = 7

distance between store (9,0) and home (0,0) = 9

7 + 9 + 7 + 9 = 32 blocks

6 0
3 years ago
580 books were delivered to a warehouse and 29 were found to be damaged.
Anvisha [2.4K]

Answer:

I think it's would be 5%

Step-by-step explanation:

Since 29 Books are damaged we do 29/580 and then get 0.05 and multiply by 100 and get 5 percent

7 0
3 years ago
Use ΔJKL and ΔMPN to determine whether Don's claim is true or false.
denpristay [2]

Answer:

I think is SSS

Step-by-step explanation:

SSS Similarity Theorem. By definition, two triangles are similar if all their corresponding angles are congruent and their corresponding sides are proportional. ... SSS Similarity Theorem: If all three pairs of corresponding sides of two triangles are proportional, then the two triangles are similar.

6 0
4 years ago
Read 2 more answers
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