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DiKsa [7]
2 years ago
6

Help me pls thank you sooooo much

Mathematics
2 answers:
ruslelena [56]2 years ago
8 0

Answer:

I think its 32.4

Step-by-step explanation:

324/30=10.8

10.8*3=32.4! Hope this helped!! :)

Lubov Fominskaja [6]2 years ago
4 0

Answer: Length: 24

Step-by-step explanation:

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Marcia made spiral books to sell at her local craft fair. She forgot to count how many she made before the fair. She knows that
Alex787 [66]

Answer:

B) 0.60n+1.48n = 176.80

Step-by-step explanation:

0.60 for every spiral wire per book = 0.60*n

0.74 per chipboard cover, 2 needed for each book = 1.48 per book = 1.48*n

Put it together: 0.60n+1.48n = 176.80

5 0
2 years ago
8. In right triangle LMN shown below, altitude MK is drawn to LN from M. IF LM = 12 and LK =10, then
Elena-2011 [213]

The length of the KN is 4.4

Step-by-step explanation:

We know from Pythagoras theorem  

In a right angle ΔLMN  

Base² + perpendicular² = hypotenuse ²

From the properties of triangle we also know that altitudes are ⊥ on the sides they fall.

Hence ∠LKM = ∠NKM = 90 °

Given values-

LM=12

LK=10

Let KN be “s”

⇒LN= LK + KN

⇒LN= 10+x        eq 1

Coming to the Δ LKM

⇒LK²+MK²= LM²

⇒MK²= 12²-10²

⇒MK²= 44           eq 2

Now in Δ MKN

⇒MK²+ KN²= MN²

⇒44+s²= MN²       eq 3

In Δ LMN

⇒LM²+MN²= LN²

Using the values of MN² and LN² from the previous equations

⇒12² + 44+s²= (10+s) ²

⇒144+44+s²= 100+s²+20s

⇒188+s²= 100+s²+20s    cancelling the common term “s²”

⇒20s= 188-100

∴ s= 4.4

Hence the value of KN is 4.4  

8 0
3 years ago
-5(5-3v)=-115<br> Helpp me please
prisoha [69]

we start by opening the brackets so it will be -25 plus 15 v is equals to 115. negative times a negative is a positive so -5 times -3 we we have gotten positive 15v there I hope you understood so our new equation is -25 + 15v is equals to 115 collect the like terms 15v is equals to 115 + 25 15 v is equals to 140 divide both sides by 15 so v is equals to 9 and 1/3

8 0
3 years ago
The diameter of the circular base of a spot is 6 inches what is the closet approximation of the area base
AlladinOne [14]

Answer:

A≈28.26 in^2

Step-by-step explanation:

We know the diameter is 6

We can find the radius

r = d/2

r =6/2 =3 inches

The area of a circle is given by

A = pi *r^2

A = pi*3^2

A = pi*9

We will use 3.14 to approximate pi

A ≅(3.14) *9

A≈28.26 in^2

4 0
2 years ago
( 2x + 5 ) + ( 3x - 7
musickatia [10]

Answer:

5x-2

Step-by-step explanation:

2x+3x=5x

5-7=-2

7 0
2 years ago
Read 2 more answers
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