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sweet [91]
3 years ago
15

-2j =-90 Answer: j = ? Answer the ? Mark pls

Mathematics
2 answers:
sleet_krkn [62]3 years ago
8 0

Answer:

j = 45

Step-by-step explanation:

-2j =-90

Divide each side by -2

-2j/-2 = -90/-2

j = 45

Nonamiya [84]3 years ago
5 0

Answer:

\huge\boxed{j=45}

Step-by-step explanation:

-2j=-90\qquad|\text{divide both sides by (-2)}\\\\\dfrac{-2j}{-2}=\dfrac{-90}{-2}\qquad|\text{we know}\ \dfrac{(-)}{(-)}\to(+)\\\\\dfrac{2\!\!\!\!\diagup j}{2\!\!\!\!\diagup}=\dfrac{90}{2}\\\\j=45

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In ΔOPQ, the measure of ∠Q=90°, the measure of ∠O=84°, and OP = 2. 9 feet. Find the length of PQ to the nearest tenth of a foot
Afina-wow [57]

OP= 27. 6

Step-by-step explanatexplanation:

In triangle OPQ: Ô+P+Q =180

therefore <P= 6°

OQ= OP sinsinà

OP= OQ/ sinà

OP= 2.9/ sin6°

OP= 27.7 ft

using pythagoras

OP^2 = PQ^2 + OQ^2

PQ= sqrt( 27.74^2 - 2.9^2)

PQ= 27.27.6

7 0
3 years ago
Investigators conducting a study regarding the effects of water pollution and peptic ulcer disease obtained the following data:
natima [27]

Answer:

Kindly check explanation

Step-by-step explanation:

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Prevalence per 1000 among the non exposed :

((90 - 60) + (268 - 238)) / 3000

(60 / 3000) * 1000 = 20

Incidence rate per 1000 among the exposed :

238 / 5940 * 1000

0.0400673 * 1000 = 40.07

Incidence rate per 1000 among the unexposed :

((90 - 30) / (3000-30)) * 1000

(60/2970) * 1000 = 20.2

7 0
3 years ago
Professor Simpson is interested if time spent studying is affected by the color of a room. She randomly assigns her students int
Pachacha [2.7K]

Answer:

IV: colour of the room

DV: The number of minutes each group spends studying

Step-by-step explanation:

IV(Independent Variable) : is what is changed in the experiment and the colour of the room is being changed.

DV(Dependent Variable) : is what is measured in the experiment and the number of minutes in spent on studying is measured.

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3 years ago
Floretta is out grocery shopping. She buys 7 pounds of bananas for $3.50. What is the unit rate for the bananas in $ ? pound You
I am Lyosha [343]

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Answer:

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To find cost per pound, divide cost by the corresponding number of pounds.

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The unit rate for bananas is $0.50 per pound.

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3 years ago
Which group of numbers is listed from greatest to least?
jonny [76]
1st group it’s obvious the numbers go from small to big
8 0
3 years ago
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