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Dvinal [7]
3 years ago
8

Svetlanas hair is 4 centimeters long her hair grows 1.5 cm per month. Svetlana wants her hair to grow so that it's at least 7 cm

long write an inequality to determine the number of months,m, it will take svetlana hair to grow so it's at least 7 cm long
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
6 0
1.5x + 4 (greater than or equal to) 7

It is greater than or equal to because she wants at least seven cm, which means that the length CAN be 7 cm, and it’s greater than because at least means a minimum of, so 7 cm or longer.

You add four because that’s how much hair she has already and you have 1.5x because that how much she growth per month. Plug in how many months for x and we’ll get a length in that amount of time
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Here are the steps

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3 years ago
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3 years ago
Evaluate the expression 3(7 + 4)2 − 14 ÷ 7. (5 points)
Kitty [74]
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5 0
3 years ago
Help its geometry...............
Digiron [165]

m GH = 57''

________


tan 39° = opposite / adjacent

tan 39° = m GH / m HJ

tan 39° *  m HJ = m GH

m HJ = m GH / tan 39°

m HJ ≈ 57'' / 0.810

m HJ ≈ 70.4''    <——<span>—    measure of the segment HJ</span>

________


sin 39° = opposite / hypotenuse

sin 39° = m GH / m GJ

sin 39° * m GJ = m GH

m GJ = m GH / sin 39°

m GJ = 57'' / 0.629

m GJ ≈ 90.6''    <———    measure of the segment GJ

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So the perimeter is

p  =  m GH  +  m HJ  +  m GJ

p  =  57''  +  70.4''  +  90.6''

p  =  218''    <——<span>—    this is the answer.</span>


I hope this helps. =)


Tags:  <em>perimeter right triangle sine cosine tangent sin cos tan trig trigonometry geometry</em>

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