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natali 33 [55]
3 years ago
9

Can someone help me with this?!

Mathematics
1 answer:
Alex787 [66]3 years ago
8 0

Answer:

y=x+2.4

Step-by-step explanation:

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The floor of a hall has an area of 48 dm.The floor is to be tiled by triangular tiles.of sides 20 cm,30 cm and 40 cm. Find the t
vovangra [49]
The triangle is an obtuse triangle. No sides are equal.
convert cm to dm

1 dm = 10 cm

side a: 20 cm ⇒ 20cm * 1dm/10cm = 20dm/10 = 2 dm
side b: 30 cm ⇒ 30cm * 1dm/10cm = 30dm/10 = 3 dm
side c: 40 cm ⇒ 40cm * 1dm/10cm = 40dm/10 = 4 dm

We need to get the area of a triangle, but first we need to solve for its height using Heron's formula

s = (a+b+c)/2 = (2+3+4)/2 = 9/2 = 4.5
<span>Area = </span>√<span>(s(s-a)(s-b)(s-c)
</span>h3/2 = √4.5(4.5-2)(4.5-3)(4.5-4)
h3/2 = √4.5(2.5)(1.5)(0.5)
h3/2 = √8.44
h3/2 = 2.91
h = (2.91*2)/3
h = 1.94

A = hb/2 = (1.94*3)/2 = 5.82/2 = 2.91 dm²

48 dm² / 2.91dm² = 16.5 or 17 tiles needed

17 x Rs200 = Rs3,400 is the total cost
7 0
3 years ago
Seth’s father is thinking of buying his son a six-month pass for $40. With the pass, matinees cost 1.00. If matinees are normall
mr Goodwill [35]

Answer:

The number of times Seth attend in order for the benefit his father to buy the pass is 2.8 times .

Step-by-step explanation:

Given as :

The price for six month pass = $ 40

The cost of matinees with the pass = $ 1.00

The cost of matinees without pass = $ 3.50

Now, According to question

If we take matinees per day for six months so, number of matinees = 6 × 30 = 180

So, The cost of matinees for six month with pass at the rate $ 1.00 each = 180 × $ 1 + $ 40

I.e The cost of matinees for six month with pass $ 220

Now, Again

The cost of matinees for six month without pass at the rate $ 3.50 each = 180 × $ 3.50

I.e The cost of matinees for six month without pass at the rate $ 3.50 each = $ 630

So, The number of times Seth attend in order for the benefit = \frac{630}{220} = 2.8

Hence  The number of times Seth attend in order for the benefit his father to buy the pass is 2.8 times . Answer

7 0
3 years ago
Solve for -3x ≤ -9<br> I need it for math so be correct
ohaa [14]

Divide each term by −3-3 and simplify.

Inequality Form:

x≥3

8 0
3 years ago
Read 2 more answers
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Alborosie

Answer:

x=2

Step-by-step explanation:

2*2-x=2

4-x=2 subtract 4 by both sides

-x= -2 multiply each side by -1

x=2   answer

3 0
2 years ago
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Answer:

Step-by-step explanation:

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3 0
3 years ago
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