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rewona [7]
2 years ago
6

Order of operations 18 ÷ 9 - 4 x 15

Mathematics
2 answers:
PolarNik [594]2 years ago
7 0

Answer:

-58

Step-by-step explanation:

18÷9-4×15

2-4×15

2-60

-58

bezimeni [28]2 years ago
6 0

Answer: I'm almost 100% its -<u>58 </u>

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Find the area of an equilateral triangle (regular 3 Gon) with the given measurement 9 in perimeter a=SQ.in
blsea [12.9K]

Answer:

3.897 in^{2}

Step-by-step explanation:

equilateral triangles are also equiangular, meaning the have equal angles.

Triangle sum theory says that angles of a triangle add up to 180.

That means each angle is 60.

A = bh/2

You need the (h). The base of is 3.  Perimeter = 9, so each side is 3

Draw a perpendicular line for the height. The line cuts the base in half (1.5)

Using trigonometry you can find the height.

tan 60° = h/1.5

h = height, 1.5 is half of 3, 60° is the base angle.

multiply each side by 1.5

1.5(tan 60°) = h

h=2.598

then substitute h into formula

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A = 3.897 rounded

4 0
3 years ago
Which of the following equations is equivalent to 3x + 4y =15
slavikrds [6]

Answer:

x= −4 /3 y+5

Step-by-step explanation:

5 0
3 years ago
For every pound a company spends on advertising, it spends 43 pence
irakobra [83]

Answer:

20:9

Step-by-step explanation:

8 0
2 years ago
X + 2y =6<br> X- y =3<br> Solution?
VikaD [51]
Since one equation has a negative y and the other has a positive y, I'm going to use those since they cancel each other out. Before that, the two y's need to be equal to each other.

x+2y=6
x-y=3

Multiply the bottom equation by two so then you have:

x+2y=6
2x-2y=6

The y's now cancel out:

x=6
2x=6

Add them together

3x=12

Divide

x=4.

To find y, plug x into either equation (*don't have to do both, but I will)

(4)+2y=6
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Subtract four

2y=2
-y=-1

Divide each

2y/2 = 2/2
y=1

-y/-1 = -1/-1
y=1

The answer is:
x=4
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I hope that helps!
4 0
3 years ago
Read 2 more answers
-7x is less than or equal to -21
julsineya [31]
The answer is x=3
if you divide each by -7 to isolate x, it’s equal to positive three because 2 negatives make a positive
6 0
3 years ago
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