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3 years ago

How do you multiply by 9s

Mathematics

1 answer:

elixir [45]3 years ago

8 0

Answer:

count that many 9s by the number your multiplying by.

Step-by-step explanation:

so example think of it like this =

9 x 9

9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 81

9 x 9 = 81

that easy ! just add the amount of 9s to the number your multiplying by . if u still need help, go on You Tube and search MathAntics .. he explains every different types of math amazing !

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The vertex is (4,y) because ? pls help

gulaghasi [49]

Answer:

Step-by-step explanation:

because I no and nono and y

6 0

3 years ago

Martine’s town is building a volleyball court based on a scale drawing that is 40cm to 80cm and uses the scale 1cm:22.5cm write

never [62]

Answer:

$y=22.5x$

Step-by-step explanation:

we have that

The scale drawing is

$\frac{1}{22.5}\frac{cm}{cm}$

we know that

Using proportion find out the actual dimensions of the volleyball court

Let

x -----> drawing court lengths in cm

y ----> court lengths in cm

For x=40 cm

$\frac{1}{22.5}\frac{cm}{cm}=\frac{40}{y}\frac{cm}{cm}\\\\y=40*22.5\\\\y=900\ cm$

For x=80 cm

$\frac{1}{22.5}\frac{cm}{cm}=\frac{80}{y}\frac{cm}{cm}\\\\y=80*22.5\\\\y=1,800\ cm$

Find the equation for the proportional relation ship between drawing court lengths x in centimeters and court lengths in y centimeters

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

For x=40 cm, y=900

substitute

$k=y/x$ -----> $k=900/40=22.5$

The equation is

$y=22.5x$

5 0

3 years ago

Solve -2=4r+s for s

musickatia [10]

Answer:

Step-by-step explanation:

-2 = 4r + s

subtract 4r from both sides of the equation

-2 -4r = s

5 0

3 years ago

Find the area of each figure. Round to the nearest hundredth where necessary. Only 1 and 5 please!

Alex787 [66]

Answer:

See below

Step-by-step explanation:

To begin, it is volume, not area

1. 8 x 12 x 17 = 1632 in ^3

5. 9 x 9 x 13.5 = 1093.5 in^3

If you want to find SURFACE AREA:

1. 2(8 x 12) + 2(8 x 17) + 2(17 x 12) = 872 in^2

5. 2(9 x 9) + 4(9 x 17) = 774 in^2

6 0

3 years ago

(2+3)*38-84+48937 divided by 2

lutik1710 [3]

The answer is 491449/2

6 0

3 years ago

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