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3 years ago

4n + 5n= -9? What is the answer?

Mathematics

2 answers:

uysha [10]3 years ago

8 0

Combine like terms:

$4n+5n=-9\\ 9n=-9$

Isolate the variable on one side of the equation:

$9n=-9\\ n=-1$

The answer is $n=-1$ .

timurjin [86]3 years ago

6 0

add 4n and 5n, which is 9. 9n=-9, and if u divide both sides by nine, n=-1

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A washer and a dryer cost 634 dollars combined. The washer cost 66 dollars less than the dryer. What is the cost of the dryer?

Nutka1998 [239]

Steps to Solve:

1. 634 / 2 = 317

2. 317 + 66 = 383

Answer:

A = $383

Notes:

Read the question, this problem is not that hard to solve!

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3 years ago

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Step-by-step explanation:

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tell whether the angles are adjacent or vertical then find the value of x. can someone help me please i need all the answers

dmitriy555 [2]

Answer:

3. adjacent; 49
4. adjacent; 71

5. verticle; 41

6. adjacent; 14

Step-by-step explanation:

ok basically if the angles are next to each other, then they're adjacent and if they're across from eachother they're verticle.

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set both equations equal to each other and solve because verticle angles are equal

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6 0

2 years ago

What are the x- and y-coordinates of point C, which partitions the directed line segment from A to B into the ratio 5:8? Round t

Fantom [35]

Answer:

(1.2, –4.7)

Step-by-step explanation:

Since in the question it is mentioned that on the plane of coordinate, a line is made from point A (7,-2) to point B(-8,-9)

Also, the ratio of A to B is 5:8

Based on this, the x and y coordinates at point C is

$= [\frac{5\times (-8) + 8\times 7}{5 + 8} , \frac{5\times (-9) + 8\times -2}{5 + 8}]\\\\= [\frac{16}{3}, \frac{-61}{13}]$

= (1.2, –4.7)

Hence, the x and y coordinates of point C is (1.2, –4.7)

Therefore the last option is correct

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2 years ago

I need help. trying to solve this.

kkurt [141]

You can use this formula
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a and b are the solutions to the equation

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8 0

2 years ago