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3 years ago

Calculate the perimeter of a rectangle with sides 9cm and 13cm

Mathematics

2 answers:

Alex787 [66]3 years ago

6 0

So if 9cm +9cm=18cm then if you do 13cm +13cm=26cm then if you add 18cm + 26cm =44 cm

Alekssandra [29.7K]3 years ago

3 0

9 x 2= 18. 13x 2=26 26+18=44cm

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I need some help with this

Ivenika [448]

Answer:

a) 6.1 feet

b) 12.6 feet

Step-by-step explanation:

Using trigonometric ratios we know that:

$sin = \frac{opp}{hyp}\\cos = \frac{adj}{hyp}\\tan = \frac {opp}{adj}$

AKA SohCahToa.

To find the height, we will use sine.

$sin(26^o)= \frac{x}{14}\\14*sin(26^o)=\frac{x}{14}*14\\14sin(26^o)=x\\x=6.14$

To find the length we will use cosine.

$cos(26^o) = \frac{x}{14}\\14*cos(26^o)=\frac{x}{14}*14\\14cos(26^o)=x\\x=12.6$

6 0

2 years ago

Please help me thank you!

Fofino [41]

Answer:

a=f/3

b=8or it g

gf/3

c=-3gx*2

bonus=f(x)=h(−4x)

Step-by-step explanation:

5 0

3 years ago

When a rate is written as money per item, a unit rate is called a

tatyana61 [14]

Answer:

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. If you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

Hopefully this helps!

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3 years ago

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Nady [450]

<h3>Multiplication Property of Equality is the missing reason</h3>

Solution:

Given that,

five thirds times x plus 2 equals negative 3

Therefore,

$\frac{5}{3}x + 2 = -3$

Multiplication Property of Equality

The Multiplication Property of Equality means that, if both sides of an equation is multiplied by same number, the equation still remains equal

$\frac{5}{3}x + 2 = -3$

Multiply both sides by 3

$3(\frac{5}{3}x + 2) = -3 \times 3\\\\5x + 6 = -9$

Subtraction Property of Equality

The Subtraction Property of Equality means that, we can subtract the same number from both sides of equation and the equation will still be true

5x + 6 = -9

Subtract 6 from both sides

5x + 6 - 6 = -9 - 6

5x = -15

Division Property of Equality

The Division Property of Equality means that, if both sides of an equation is divided by same number, the equation still remains true

5x = -15

Divide both sides by 5

x = -3

4 0

2 years ago

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Answer the following questions. (a) What percent of 80 is 44? (b) What number is 45% of 40?

Pavlova-9 [17]

Answer:

a. 55%

b. 22

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers