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MArishka [77]
3 years ago
10

Find the perimeter of a square of sides 10.5cm​

Mathematics
2 answers:
astraxan [27]3 years ago
6 0

Answer:

42 cm

Step-by-step explanation:

A square has 4 equal sides. To find the perimeter, add all side lengths together.

1. Set up the equation and solve

10.5 + 10.5 + 10.5 + 10.5 = 42

lions [1.4K]3 years ago
4 0
The answer is 42 because you add 10.5+10.5 +10.5+10.5=42 or do 10.5x4=42
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olga nikolaevna [1]

Answer:

with the X you now know you will have to multiply then you need to figure out what the other side of the = sign is with X and you should get your answer!

Step-by-step explanation:

That's all I know Sorry

4 0
3 years ago
Read 2 more answers
-2 (m+n-4)+5 (-2m+2n)+n (m+4n-5)
Natalka [10]
So if you want to add
we distribute
a(b+c)=ab+ac so
-2(m+n-4)=-2m-2n+8

5(-2m+2n)=-10m+10n

n(m+4n-5)=mn+4n^2-5n

so total we ahve
-2m-2n+8-10m+10n+mn+4n^2-5n
group like terms
4n^2+-2m-10m-2n+10n-5n+mn+8
add like temrs
4n^2-12m+3n+mn+8
5 0
3 years ago
A boy borrowed his boat 531 feet out into the ocean. When he looked back he saw the house on a cliff above the beach where he se
Ludmilka [50]

Answer:

259 ft.

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. Types of triangles are isosceles. scalene, equilateral, acute, obtuse and right angled triangle.

A right angled triangle is a triangle in which one of the angles is 90 degrees. Trigonometric ratios show the relationship between the angles of a right angle triangle and its sides.

Let h represent the height of the house above water, hence using trigonometric ratios:

tan(26) = h / 531

h = 531 * tan(26)

h = 259 ft.

8 0
2 years ago
Jada lives 1 3/10 miles from school. Lin lives 1/4 mile closer to school than Jada. How far does Lin live from school? Type in t
nekit [7.7K]

Answer:

Lin lives 1 1/20 miles away from school

Step-by-step explanation:

1 3/10 becomes 1 6/20

1/4 becomes 5/20

1 6/20 - 5/20

= 1 1/20

6 0
2 years ago
The science club advisor expects that between 42 and 49 students will attend Science Club field trip. The school allows $5.50 pe
baherus [9]

Answer:

$269.50

Step-by-step explanation:

Between 42-49

So, you have to assume 49 students will arrive, better to have more and have left overs than get less and not find kids.

As for math you just do 49 x 5.50 = 269.5

Finally that measn the budget for the food is $269.50

8 0
3 years ago
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