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Rama09 [41]
3 years ago
13

How to solve 42j+18-19j=-28

Mathematics
2 answers:
Kryger [21]3 years ago
5 0

Answer:

j=-2

Step-by-step explanation:

42j+18-19j=-28

Combine like terms

23j +18=-28

Subtract 18 from each side

23j +18-18 = -28 -18

23j =-46

Divide each side by 23

23j/23 = -46/23

j = -2

Stels [109]3 years ago
4 0

Answer:

j = -2

Step-by-step explanation:

Simplify. First, combine like terms:

(42j - 19j) + 18 = -28

23j + 18 = -28

Isolate the variable, j. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS is the order of operation, and equals:

Parenthesis

Exponents (& roots)

Multiplication

Division

Addition

Subtraction.

~

First, subtract 18 from both sides:

23j + 18 (-18) = - 28 (-18)

23j = -28 - 18

23j = -46

Isolate the variable, j. Divide 23 from both sides:

(23j)/23 = (-46)/23

j = -46/23

j = -2

j = -2 is your answer.

~

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natka813 [3]

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6 0
3 years ago
A tiny but horrible alien is standing at the top of the Empire State Building (which is
Leto [7]

Answer:

87.7 degrees.

Step-by-step explanation:

In triangle ABC, attached.

The height of the building |AB|=443 meters

The distance of the agent across the street , |BC|=18 meters

We want to determine the angle at C.

Now,

Tan C=\dfrac{|AB|}{|BC|} \\C=arctan (\dfrac{|AB|}{|BC|} )\\=arctan (\dfrac{443}{18} )\\=87.67^\circ\\\approx 87.7^\circ $(correct to the nearest tenth)

The agent should sfoot his laser gun at an angle of 87.7 degrees.

7 0
4 years ago
Work out the area of this shape. ? cm2<br><br> 4 cm<br> 9 cm<br> 6 cm<br> 12 cm<br><br> Help!!!
mars1129 [50]

Answer:

84 cm^2

Step-by-step explanation:

Area of triangle + area of rectangle

Area of triangle = 1/2*l*b

= 1/2*8*3= 12 cm^2

Area of rectangle = l*b

= 12*6 = 72 cm^2

Total area= 72+12

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7 0
3 years ago
The American flag is customarily made with its width and length in the ratio of 10 to 19. Which of the following dimensions is i
saul85 [17]
You have not provided the options, therefore, I cannot give an exact answer. However, I can help you with the procedures.

We are given that the ratio between the width and the length of the flag is 10 to 19.
This means that:
\frac{width}{length} =  \frac{10}{19}

Therefore, to get the correct choice, all you have to do is divide the width by the length, if the result is 10/19, then the dimensions given are correct.

Examples:
For length = 190 and width = 100,
width / length = 100 / 190 = 10 / 19 .........> correct choice

For length = 1.9 and width = 1,
width / length = 1 / 1.9 = 10 / 19 .......> correct choice

Hope this helps :)
3 0
3 years ago
. one decimal place
SOVA2 [1]

Answer:

1. 168

2. 70

3. 15

Hope that this helps!

3 0
3 years ago
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