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topjm [15]
2 years ago
9

Detailed answers appreciated: (7a -4) (2a -5)

Mathematics
2 answers:
igor_vitrenko [27]2 years ago
5 0
Expand the expression?

Perform indicated multiplication:

7a(2a)+7a(-5)-4(2a)-4(-5)

14a^2-35a-8a+20  combine like terms, ie (-35a-8a)=-43a

14a^2-43a+20
lana66690 [7]2 years ago
5 0
1. Us the FOIL method: (a + b)(c + d) = ac + ad + bc + bd:
14a^2 - 35a - 8a + 20
2. Collect like terms:
14a^2 + (-35a - 8a) + 20
3. Simplify:
14a^2 - 43a + 20
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Mamont248 [21]

Answer:

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Step-by-step explanation:

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  • we use following operations to solve the inequality:
  • by adding 4 on both sides, the inequality will become :

-4+4 ≤ 11-3x +4

0 ≤ 15 -3x

  • adding 3x on both sides, the inequality will become:

3x ≤ 15

  • dividing both the sides of the inequality by 3, the inequality will become:

3x/3 ≤ 15/3

x ≤ 5                  ( since, 15/3 = 5)

  • therefore the solution for x as an inequality will be x ≤ 5
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3 years ago
An electronics store sells DVD players and cordless telephone. The store makes a $75 profit on the sale of each DVD player (d) a
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<h3>Inequality</h3>

75d + 30c ≥ 255

<h3>Examples</h3>

(1) If someone bought five DVD players and ten cordless telephones, the equation ((75)(5)+(30)(10)≥255) would be true.

(2) If the electronic store had a parcticularly bad day and they sold two DVD players and one cordless telephone, the equation ((75)(2)+(30)(1)≥255) would be false.

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2 years ago
What is the multiplicative of 6
ankoles [38]
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Answer:

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Step-by-step explanation:

[ Refer to the attachment ]

8 0
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