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3 years ago

Express 7 min.30sec.as a percentage of 1 hour .

Mathematics

2 answers:

const2013 [10]3 years ago

6 0

Time percentage

7 1

30 x

cross multiple

7(x) = 30(1)

7x=30

divide both side by 7

7cancell 7 living

x = 30

cross multiple

fgiga [73]3 years ago

3 0

Answer:

well for me

Step-by-step explanation:

7 mins

7×60

=420

plus the 30sec

450 sec

450/3600×100

45000/3600

450/36

12.5

that's how I can help

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Thepotemich [5.8K]

Answer:

Step-by-step explanation:

below 0 is negative

so -15

7 0

3 years ago

Read 2 more answers

How to solve this question?

fiasKO [112]

Hi!

For this equation, you can solve it by using the quadratic formula:
x=-b±sqrt/b^2-4ab
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3 years ago

Type the correct answer in each box. If necessary, round your answers to the nearest hundredth.

disa [49]

Answer:

Perimeter = 32.44 units

Area = 30 square units

Step-by-step explanation:

Given

Vertices

A(2,8), B(16,2) and C(6,2)

WE have to determine the lengths of all sides before finding the perimeter and area.

The formula of modulus is:

$d = \sqrt{(x_{2}- x_{1})^{2} +(y_{2}-y_{1})^{2}}\\AB=\sqrt{(16-2)^{2} +(2-8)^{2}}\\=\sqrt{(14)^{2} +(-6)^{2}}\\=\sqrt{196+36}\\ =\sqrt{232}\\=15.23\\\\BC=\sqrt{(6-16)^{2} +(2-2)^{2}}\\=\sqrt{(-10)^{2} +(0)^{2}}\\=\sqrt{100+0}\\ =\sqrt{100}\\=10\\\\AC=\sqrt{(6-2)^{2} +(2-8)^{2}}\\=\sqrt{(4)^{2} +(-6)^{2}}\\=\sqrt{16+36}\\ =\sqrt{52}\\=7.21\\\\$

So the perimeter is:

$Perimeter=AB+BC+AC\\=15.23+10+7.21\\=32.44\ units$

Using hero's formula,

$s=\frac{perimeter}{2}\\s=\frac{32.44}{2}\\ s=16.22\\Area=\sqrt{s(s-a)(s-b)(s-c)}\\=\sqrt{16.22(16.22-15.23)(16.22-10)(16.22-7.21)}\\=\sqrt{(16.22)(0.99)(6.22)(9.01)}\\=\sqrt{899.91}\\=29.99\ square\ units$

Rounding off will give us 30 square units ..

4 0

3 years ago

Find the reciprocal (Urgent!!)

Mars2501 [29]

Answer:

1) 2

2) $\frac{3}{2}$ or $1\frac{1}{2}$

3) 5

4) 3

5) $\frac{5}{3}$ or $1\frac{2}{3}$

6) $\frac{4}{5}$

7) $\frac{5}{2}$ or $2\frac{1}{2}$

8) $\frac{7}{3}$ or $2\frac{1}{3}$

9) $\frac{2}{3}$

Step-by-step explanation:

The reciprocal is the fraction flipped. To make sure it is a reciprocal though, multiply the original and the reciprocal. If it is the correct reciprocal, you will get 1 as your answer.

Hope it helps!

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3 years ago

Hi can someone help with this question? Thanks!!!

aleksandrvk [35]

Sorry I cant help you with that good luck with that.

4 0

3 years ago

Express 7 min.30sec.as a percentage of 1 hour .​

Express 7 min.30sec.as a percentage of 1 hour .