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BigorU [14]
2 years ago
13

What is the value of the expression -3x²y + 4x

Mathematics
2 answers:
Elanso [62]2 years ago
7 0

\huge\mathfrak{Answer}

By Plugging the value of x and y :

  • - 3 {x}^{2} y + 4x

  • ( - 3 \times ( - 4) {}^{2}  \times 2) + (4 \times  - 4)

  • ( - 3 \times 16 \times 2) + ( - 16)

  • - 96 - 16

  • - 112

therefore, the answer is - 112

pogonyaev2 years ago
5 0
The answer of this question is A. -112
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3 years ago
2x-3 = 4(x-1) -1 -2x is this equation conditional , contradiction, or identity
JulsSmile [24]

Answer:

identity

Step-by-step explanation:

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3 years ago
Brady rode his bike 70 miles in 4 hours. He rode at an average speed of 17 miles per hour for t hours and at an average rate of
IceJOKER [234]

Answer:

Brady rides at slower speed which is 17 miles/hours for <em><u>3 hours and 36 minutes.</u></em>

Step-by-step explanation:

Given:

Brady rode 70 miles in 4 hours.

For t hours he rode at the average rate of 17 miles/hour

For rest of the time he rode at the average rate of 22 miles per hour.

To find the time Braady rode at the slower speed.

Solution:

Total time of riding = 4 hours

Time for which Brady rides at 17 miles/ hour = t  hours

Distance covered in t hours = Speed\times time=17\times t =17t\ miles

So, time for which Brady rides at 22 miles/ hour = (4-t) hours

Distance covered in (4-t) hours = Speed\times time=22\times(4-t) =(88-22t)\ miles

Total distance can be given as:

⇒ 17t+88-22t

Simplifying.

⇒ -5t+88

Total distance given =70 miles.

Thus, the equation to find t can be given as:

-5t+88=70

Subtracting both sides by 88.

-5t+88-88=70-88

-5t=-18

Dividing both sides by -5.

\frac{-5t}{-5}=\frac{-18}{-5}

∴ t=3.6 hours

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Thus, Brady rides at slower speed which is 17 miles/hours for 3 hours and 36 minutes.

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Klio2033 [76]

Answer:

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Step-by-step explanation:

Area = ½*base*height

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Base = 7 units

Area = ½*9*7

Area = ½*63

Area = 63/2

Area = 31.5 units²

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2 years ago
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