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IgorC [24]
3 years ago
13

Find the missing side length to the nearest tenth of a millimeter

Mathematics
1 answer:
Ratling [72]3 years ago
4 0

Answer:

4.7

Step-by-step explanation:

5.2²+b²=7²

27.04+b²=49

b²=49-27.04

b²=21.96

b=√21.96

b=4.68614

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The area of a rectangle is 108 m2 and its diagonal is 15 m. Find
Andre45 [30]

Answer:

47.6m.

Step by step solution:

Perimeter of a triangle = base + 2 . length____(1)

Area of a triangle = 1/2 . base . diagonal

108 = 1/2 . base . 15

multiplying both sides by 2:

216 = 15 . base

dividing both sides by 15:

base = 14.4m

But the diagonal divides the triangle into two

right angle triangles each with the same length (hypotenuse),base and diagonal(height).

Taking one right angle triangle:

And using pythagoras theorem;

length² = base² + diagonal ²

length² = 7.2² + 15²

Note: Base of each right angle triangle is 7.2 which would sum up to be 14.4 the base of the full triangle.

length² = 276.84

taking the square root of both sides:

length = 16.6m

Putting the values of the base and length into equation (1).

Perimeter of the triangle = 14.4 + 2 . 16.6

Note: We are dealing with the whole triangle

now hence the base is 14.4m.

Perimeter of the triangle = 14.4 + 33.2 = 47.6m.

6 0
3 years ago
Read 2 more answers
ned, the owner of neds nut shop, sells peanuts for $7 per pound and cashews for $6 per pound. ned wants to great a 20 pound barr
Lana71 [14]

Answer:

He should use 3 pounds of peanuts and cashews.

8 0
3 years ago
18. Population density is the number of people
adelina 88 [10]

The region that covers 23 km^2 has population of 1380 people

Step-by-step explanation:

The population is calculated using population density by multiplying the population density with the area.

Here,

Population density = d = 60 people per kilometer^2

Area = a = 23 km^2

So,

The\ population\ in\ given\ area = d * a\\=60*23\\=1380\ people

The region that covers 23 km^2 has population of 1380 people

Keywords: Population, Density

Learn more about population at:

  • brainly.com/question/2131336
  • brainly.com/question/2150928

#LearnwithBrainly

7 0
3 years ago
A student factors a^6-64 to (a^2-4)(a^4+4a^2+16) is correct
TiliK225 [7]

Answer:

yes

Step-by-step explanation:

hope this helps

5 0
3 years ago
The axis of symmetry for the graph of the function is f(x) = x2 + bx + 10 is x = 6. What is the value of b?
joja [24]

Answer:

b=-12

Step-by-step explanation:

we have

f(x)=x^{2}+bx+10

we know that

The equation of a vertical parabola into vertex form is equal to

y=a(x-h)^{2} +k

where

(h,k) is the vertex of the parabola

and the axis of symmetry is equal to x=h

In this problem we have the axis of symmetry x=6

so

the x-coordinate of the vertex is equal to 6  

therefore

For x=6+1=7 -----> one unit to the right of the vertex

Find the value of f(7)

f(7)=7^{2}+b(7)+10

f(7)=59+7b

For x=6-1=5 -----> one unit to the left of the vertex

Find the value of f(5)

f(5)=5^{2}+b(5)+10

f(5)=35+5b

Remember that

f(5)=f(7) ------> the x-coordinates are at the same distance from the axis of symmetry

so

59+7b=35+5b ------> solve for b

7b-5b=35-59

2b=-24

b=-12


3 0
3 years ago
Read 2 more answers
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