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4 years ago

Help please just the first 2

Mathematics

1 answer:

Mila [183]4 years ago

7 0

Answer:

u probably need to just count the boxes. some are half so take it as 0.5

let the size of each box be 1 cm.

1) 14 cm or 14 unit (i m sure for this one)

2) it would approximately be 15 unit

my teacher taught me if the boxes are have different measurement other than half so just don't count that

u will fine your answers at the back of your textbook

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for what value of the variable is the value of the expression -3(2x+1) is 20 greater than the expression 8x+5

stiv31 [10]

Answer:

- 3 ( 2x+1 ) 20

8x+5

_____________

8x+5×20 -3 ( 2×12.5+1 )

8×=100 -3 ( 25+1 )

100÷8= 12.5 -3 ( 26 )

×= 12.5

-3 ( 26 )

-3×2 + -3×6 = -6+ -18 = -24

-24

6 0

3 years ago

Here is the picture pls answer another for my lil friend lol

Fantom [35]

Answer:

Hey there!

The perimeter can be expressed as 140+140+68 $\pi$

This is equal to 493.52 m

Hope this helps :)

5 0

4 years ago

The picture below shows a pole and its shadow:

scZoUnD [109]

Answer:

Step-by-step explanation:

You need to use Pythagorean's Theorem to find the height of the pole. Namely,

$pole^2+15^2=113^2$ and

$pole^2=113^2-15^2$ and

$pole^2=12769-225$ and

$pole^2=12544$ so

pole = 112 cm

8 0

4 years ago

Please help with this too

vovikov84 [41]

Answer:

Step-by-step explanation:

Garden roller is in the shape of cylinder.

So, one revolution = Curved surface area of the cylinder

diameter = 70 cm

radius = 70/2 = 35 cm

h = 100 cm

Curved surface area of the cylinder = 2πrh

= $2*\frac{22}{7}*35*100$

= 22000 square cm

Area covered in 15 revolutions = 15 * 22000

= 330000 square cm

2) Coin

diameter = 22 mm

r = 22/2 = 11 mm

Volume of coin = 66 mm

πr²h = 66

$\frac{22}{7}*11*11*h=66\\\\\\h=\frac{66*7}{11*11*22}\\h=0.17 mm$

8 0

3 years ago

Finley makes 1 batch of her favorite shade of orange paint by mixing 5 liters of yellow paint with 3 liters of red paint. How ma

Zielflug [23.3K]

Finley can make 5 batches of her favorite orange paint if she has 15 liters of red paint. You can find this by dividing 15 by 3. The information about the yellow paint is unnecessary information and can be overlooked in the context given, and by dividing 15 by 3, you get 5.

7 0

3 years ago