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4 years ago

How many minutes are there on 40 hours

Mathematics

2 answers:

Whitepunk [10]4 years ago

8 0

There is 60 min in 1 your so 60×40=2,400

mash [69]4 years ago

6 0

1 hour is 60 minutes. So you know that. Now, do 40×60=2400

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The sum of two numbers is 9. Their difference is 15. Find the two numbers.

tankabanditka [31]

Answer:

x= 12 y= -3

Step-by-step explanation:

Rearrange.

x+y=9

x-y=15

Get x by itself, cancel out the y's and you'll get this:

2x=24

x= 12

Plug it in.

12+y=9

Get y.

y= -3

Check your work. I hope this helped.

5 0

4 years ago

.prove that cos (90-A).sinA + sin(90 - A).cosA = 1

pav-90 [236]

Answer:

See Explanation

Step-by-step explanation:

$cos (90-A).sinA + sin(90 - A).cosA = 1 \\ \\ LHS = cos (90-A).sinA + sin(90 - A).cosA \\ \\ = sinA.sinA + cosA.cosA\\ \\ = sin ^{2} A + cos^{2} A \\ \\ = 1 \\ \\=RHS\\\\ reason \\ cos (90- \theta) = sin \theta \\ sin (90- \theta) = cos \theta \\ sin ^{2} \theta + cos^{2} \theta = 1 \\ \\ thus \: proved \\$

4 0

3 years ago

Find the area of the shaded region

snow_tiger [21]

Answer:

42.92

Step-by-step explanation:

3 0

3 years ago

PLEASE HELP

sweet-ann [11.9K]

Answer:

m < ANM = 36 degrees.

AM = 9.40 cm to the nearest hundredth.

Perimeter = 94.05 cm to the nearest hundredth.

Step-by-step explanation:

As we have a regular pentagon:

m < ANB = 360 / 5

= 72 degrees

So m < ANM = 1/2 * 72

= 36 degrees.

In the triangle ANM, AN = 16 so

sin 36 = Am / 16

AM = 16 sin36

= 9.4045 cm.

AB = 2 * AM = 18.809 cm

So as all sides are equal:

Perimeter = 5 * 18.809

= 94.05 cm.

4 0

3 years ago

Solve for b₂, in terms of the area of a trapezoid, A, the height, h, and b₁: A =1/2 (b₁ + b₂)h

nikklg [1K]

Answer: b₂=2A/h-b₁

Step-by-step explanation:

A =1/2 (b₁ + b₂)h

2A=(b₁ + b₂)h

2A/h=b₁ + b₂

b₂=2A/h-b₁

8 0

2 years ago