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Ostrovityanka [42]
3 years ago
12

Solve using substitution. y = –9x − 1 y = –4x − 6 ( __ , __ )

Mathematics
1 answer:
Alenkasestr [34]3 years ago
4 0

Answer:

x=-y-1/9

y=9x-1

x=-y/4-3/2

y=-4x-6

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In order for the barge operator to meet his expenses, he has to haul at least 120 tons of freight. How many railroad cars must t
UNO [17]

Answer:

3

Step-by-step explanation:

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3 years ago
If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures ...
Vedmedyk [2.9K]

Answer:

The third angle measures 80°

Step-by-step explanation:

Let us solve the question

In any triangle

∵ The sum of the measures of the interior angles of a triangle is 180°

∵ The angle of triangles are ∠1, ∠2, and ∠3

∴ m∠1 + m∠2 + m∠3 = 180°

∵ Two of the angles of the triangle are 30° and 70°

∴ m∠1 = 30°

∴ m∠2 = 70°

→ Substitute them in the rule above

∴ 30° + 70° + m∠3 = 180°

→ Add the like terms

∵ (30 + 70) + m∠3 = 180

∴ 100 + m∠3 = 180

→ Subtract 100 from both sides

∵ 100 - 100 + m∠3 = 180 - 100

∴ m∠3 = 80°

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7 0
3 years ago
What is the percent of change from 14 inches 26 inches
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To find the percent of anything, you divide what you have from the total (or the smaller number over the bigger number). In this case, you will do 14/26.
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Move the decimal place two times to the right: 54
The percent change from 14 inches to 26 inches is 54%
4 0
3 years ago
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