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3 years ago

HELP ASAP

Mathematics

1 answer:

tia_tia [17]3 years ago

3 0

2,700 / 12 = 225
225 / 5 = 45
They can make 45 necklaces.

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A floor is made up of 20 triangular tiles, each with sides 40 cm, 24 cm and 32 cm. Find the cost of polishing the floor at the r

pochemuha

Answer:

$15360\,\,rupees$

Step-by-step explanation:

Let sides of the triangle be $a,b,c$

$a=40\,,\,b=24\,,\,c=32$

Semi-perimeter (s) = $\frac{a+b+c}{2}$

$=\frac{40+24+32}{2}\\ =\frac{96}{2}\\=48$

Area of one tile $=\sqrt{s(s-a)(s-b)(s-c)}$

$=\sqrt{48(48-40)(48-24)(48-32)}\\ =\sqrt{48(8)(24)(16)}\\ =\sqrt{147456} \\=384\,\,cm^2$

So,

Area of 20 tiles $=20(384)=7680\,\,cm^2$

Cost of polishing the floor at the rate of 2 rupees per sq.cm = $7680(2)=15360\,\,rupees$

7 0

3 years ago

Find the missing segment in the image below

Talja [164]

The missing segment is 25

5 0

3 years ago

Read 2 more answers

The graph shows the rate at which paint is used to paint a wall. wat are the values to each statement below based on the graph.

zhuklara [117]

Answer:

Step-by-step explanation:

When 1 gallon is has been used 400 square feet of the wall will be paint
The unit rate is 400 square feet per gallon

3 0

3 years ago

a small airplane flies 625 miles with an average speed of 250 mph.. 1.25 hours after the plane leaves a boeing 747 leaves from t

kipiarov [429]

Time for first plane = 625 / 250
= 2.5 hours
after 1.25 hours
boeing 747 takes 1.25 hours (2.5 - 1.25) to arrive at the same location at the same time
so, speed = distance / time
= 625 / 1.25
= 500
the average speed of the boeing 747 is 500 mph

8 0

3 years ago

What is 155.78=2.95h+73.18<br> a. 28<br> b. 36<br> c. 3.6<br> d. none of these

xz_007 [3.2K]

Answer:

a. 28

Step-by-step explanation:

Given:

$155.78=2.95h+73.18$

We need to evaluate given expression to find the value of 'h'.

Solution:

$155.78=2.95h+73.18$

Now first we will apply Subtraction property of equality and subtract both side by 73.18 we get;

$155.78-73.18=2.95h+73.18-73.18\\\\82.6=2.95h$

Now we will use Division property of equality and divide both side by 2.95 we get;

$\frac{82.6}{2.95}=\frac{2.95h}{2.95}\\\\h=28$

Hence After evaluating given expression we get the value of 'h' as 28.

8 0

3 years ago