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2 years ago

13

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

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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dangina [55]

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3 years ago

2x-3 = 4(x-1) -1 -2x is this equation conditional , contradiction, or identity

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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.

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

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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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3 years ago

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Klio2033 [76]

Answer:

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Step-by-step explanation:

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