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ahrayia [7]
3 years ago
6

Evaluate -7a – 2b, if a = -1 and b = 2

Mathematics
2 answers:
ValentinkaMS [17]3 years ago
8 0

Answer:

3

Step-by-step explanation:

Plug in the values for a and b=     -7(-1)-2(2)

Multiply=   7-4

Subtract=   3

Hope this helps ^-^

Alborosie3 years ago
6 0

Answer:

3

Step-by-step explanation:

We'd just substitute the value provided to us with the variable.

-7(-1) - 2(2)

-7 * -1 = 7

-2(2) = -4

7-4 = 3

Our answer is 3

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Multiply two and four-fifths negative five and two-thirds.
erik [133]

Answer:

Mixed number: -12 2/15

Improper fraction: -182/15

Step-by-step explanation:

2 4/5 x -5 2/3

First, change into improper fractions

14/5 x -13/3

= -182/15

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6 0
4 years ago
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If a house has 5 bedrooms 3 bathrooms and 1 kitchen, Garage, and backyard and each area of the house take 7 hours to clean when
natali 33 [55]

Answer:

77 hours

Step-by-step explanation:

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6 0
3 years ago
Which compound sentence has its solution set shown on the graph below
musickatia [10]

A compound inequality is a sentence with two inequality statements joined either by the word “or” or by the word “and.” “And” indicates that both statements of the compound sentence are true at the same time.

“Or” indicates that, as long as either statement is true, the entire compound sentence is true.

Now as shown in the graph, the solution inequality of the graph is :

x > 3 and x < 5   [please note, circles in the graph indicate exclusion, dots indicate inclusion. in the graph given circles are shown, so it depicts exclusion]

Now let's solve each option to find if it fits in with the above inequality

Option 1 : 2x-4 > 6 or 3x < 9

⇒ x > 5 or x < 3

Option 2 : 2x - 4 < 6 and 3x > 9

⇒ x < 5 and x > 3

Option 3 : 3x + 8 > -7 or -4x < 12

⇒ 3x > -15 or x < -3

⇒ x > -5 or x < -3

Option 4 : 3x + 8 < -7 and -4x > 12

⇒ 3x < -15 and x > -3

⇒ x < -5 and x > -3


So the compound sentence in option 2 : 2x - 4 < 6 and 3x > 9

has its solution set on the graph.


8 0
3 years ago
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