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kondor19780726 [428]
2 years ago
15

What is the value of the following expression when d=2? 3d + (2.d)-4

Mathematics
1 answer:
Lostsunrise [7]2 years ago
6 0

Answer:

6

Step-by-step explanation:

I used a calculator and the answer is 6

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What is the product of 2x - 5 and 3x2 + 5x - 7? Write your answer in standard form. Show your work. Is the product of 2x – 5 and
Lesechka [4]

Answer:

a) 6x³ − 5x² − 39x + 35

b) no

Step-by-step explanation:

(2x − 5) (3x² + 5x − 7)

Distribute:

3x² (2x − 5) + 5x (2x − 5) − 7 (2x − 5)

Distribute again:

6x³ − 15x² + 10x² − 25x − 14x + 35

Combine like terms:

6x³ − 5x² − 39x + 35

5x − 2 is the opposite of 2x − 5, so you would get the negative of the answer from part (a).

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Step-by-step explanation:

three less than 5 so three will come after the 5. and the number (x) is being multiplied by 5

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