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2 years ago

High School

Mathematics

1 answer:

Lilit [14]2 years ago

6 0

Answer:

Step-by-step explanation:

6) y = 2x² + 6x - 80

1) y = 2*x² + 2*3x - 2*40

y = 2 [ x² + 3x - 40]

2) Sum = 3

Product = -40

Factors = (-5) ; 8 {-5 +8 = 3 ; (-5)*8 = -40}

y = 2 [ x² + 8x - 5x - 40]

= 2 [ x(x + 8) - 5(x + 8) ]

= 2 [ (x +8) (x - 5)]

y = 2(x +8)(x -5)

b) y = 0

2(x + 8)(X - 5) = 0

x + 8 = 0 ; x - 5 = 0

x = -8 ; x = 5

(-8) ; 5 are the zeros.

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QR = 36 ; PR = 45 ; PQ = 21, Sin __?___ = 21 / 45

sammy [17]

Answer:

Sin = PQ / PR = OPPOSITE / HYPOTENUSE

Step-by-step explanation:

Please find the attached file for a clearer understanding.

SOHCAHTOA

Sin = opposite / Hypotenuse

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3 years ago

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Yo got an easy questioin for u guys why does canvas suck so much?

r-ruslan [8.4K]

Answer:

Step-by-step explanation:

No esay but they just do

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3 years ago

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Look at the picture below

Lelu [443]

Answer: Phillip is correct. The triangles are <u>not </u>congruent.

How do we know this? Because triangle ABC has the 15 inch side between the two angles 50 and 60 degrees. The other triangle must have the same set up (just with different letters XYZ). This isn't the case. The 15 inch side for triangle XYZ is between the 50 and 70 degree angle.

This mismatch means we cannot use the "S" in the ASA or AAS simply because we don't have a proper corresponding pair of sides. If we knew AB, BC, XZ or YZ, then we might be able to use ASA or AAS.

At this point, there isn't enough information. So that means John and Mary are incorrect, leaving Phillip to be correct by default.

Note: Phillip may be wrong and the triangles could be congruent, but again, we don't have enough info. If there was an answer choice simply saying "there isn't enough info to say either if the triangles are congruent or not", then this would be the best answer. Unfortunately, it looks like this answer is missing. So what I bolded above is the next best thing.

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3 years ago

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Does anyone know how to finish this equation?

nikdorinn [45]

Not sure what you mean?

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2 years ago

What step do I do next ?

Svetach [21]

When it comes to dividing decimals, bear in mind that, first off you'd want to do away with the decimal point.

now, "you add as many zeros to the other term, as it has decimals", what the heck does that mean?

for example 2.135 ÷ 5

notice, the 2.135 has three decimals, namely three numbers to the right of the decimal point.

since 2.135 has three decimals, then what we do, we add three zeros to 5, AND do away with the decimal point, thus our division is really

2135 ÷ 5000, which is 0.427

now, if we had 2.135 ÷ 5.79

what we do is, since 2.135 has three decimals, we add three zeros to 5.79, and since 5.79 has two decimals, we add two zeros to 2.135, then our division is really

213500 ÷ 579000 <-- notice, no dot on both

which is about 0.3687392

anyhow, that said, check the picture below

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3 years ago