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3 years ago

What is the perimeter of a rectangle with a width of 20.3 cm and a length of 30.2 cm

Mathematics

2 answers:

givi [52]3 years ago

4 0

Answer:

101cm

Step-by-step explanation:

Because you have to add 20.3+20.3 because there is two sides of that measurment and then add 30.2 and 30.2 and you get 101.

klemol [59]3 years ago

3 0

Answer:

P = 101

Step-by-step explanation:

2(l+w)

2(30.2+20.3)

101

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The volume of prism having its base a right angled triangle is 864cm^3.if the length of the sides containing the right angle are

Scrat [10]

Answer:

height: 36 cm

Step-by-step explanation:

volume of triangle prism = 0.5 * base * altitude * height

using the formula:

0.5 * 8 * 6 * height = 864

24 * height = 864

height = 864/24

height = 36 cm

7 0

2 years ago

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Find the sum: (3x^2+2x+3)+(x^2+x+1)

elena-s [515]

Answer:

4x2 + 3x + 4

Step-by-step explanation:

Step-1 : Multiply the coefficient of the first term by the constant 4 • 4 = 16

Step-2 : Find two factors of 16 whose sum equals the coefficient of the middle term, which is 3 .

-16+-1=-17

-8+-2=-10

-4+-4=-8

-2+-8=-10

-1+-16=-17

1+16=17

2+8=10

4+4=8

8+2=10

16+1=17

Final result :

4x2 + 3x + 4

3 0

2 years ago

Solve the system of equations by substitution.<br> X + y = 21<br> y = 6x

eimsori [14]

Answer:

x = 3

y = 18

Step-by-step explanation:

you replace y with 6x

x + 6x = 21

combine like terms

7x = 21

divide both sides by seven

x = 3

then you plyg 3 into the other equation

y = 6(3)

y= 18

5 0

2 years ago

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What is the area of this figure? 20 pts and brainliest!!!! neeed help asap!!!!!! due today!!!!

Dmitrij [34]

Answer:

72yd^2

Step-by-step explanation:

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2 years ago

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an astronomer wishes to measure on a photograph the distance between the image of a certain star and three star other star image

Greeley [361]

The astronomer has to choose 3 star images out of 8.This is a problem of combinations. This can be expressed as 8C3 i.e. combination of 8 objects taken 3 at a time.

$8C3= \frac{8!}{3!*5!}=56$

This means, if 8 images are nearby the astronomer will have 56 choices <span>of the three stars.</span>

6 0

3 years ago