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3 years ago

Explain how you can use a quick picture to find 3 x 2.7

Mathematics

2 answers:

Nat2105 [25]3 years ago

8 0

3 x 2.7 is the same as 3 x 3 x 0.9 = 9 x 0.9 = 8.1

oksian1 [2.3K]3 years ago

4 0

You can also multiply like a normal number and add the decimal place
2.7×3. 27×3=81. and add the decimal point so 8.1

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5. 3x + 5y + 5z =1<br> x - 2y = 5<br> 2x + 4y = 11

lilavasa [31]

Answer:

see explanation

Step-by-step explanation:

Given the 3 equations

3x + 5y + 5z = 1 → (1)

x - 2y = 5 → (2)

2x + 4y = 11 → (3)

Use (2) and (3) to solve for x and y

Multiply (2) by 2

2x - 4y = 10 → (4)

Add (3) and (4) term by term

4x = 21 ( divide both sides by 4 )

x = $\frac{21}{4\\}$

Substitute this value of x into (3)

2 × $\frac{21}{4\\}$ + 4y = 11

$\frac{21}{2\\}$ + 4y = 11 ( subtract $\frac{21}{2\\}$ from both sides )

4y = $\frac{1}{2}$ ( divide both sides by 4 )

y = $\frac{1}{8\\}$

Substitute the values of x and y into (1) and solve for z

3 × $\frac{21}{4\\}$ + 5 × $\frac{1}{8\\}$ + 5z = 1

$\frac{63}{4}$ + $\frac{5}{8}$ + 5z = 1

$\frac{131}{8}$ + 5z = 1 ( subtract $\frac{131}{8}$ from both sides )

5z = - $\frac{123}{8}$ ( divide both sides by 5 )

z = - $\frac{123}{40}$

Solution is

x = $\frac{21}{4\\}$ , y = $\frac{1}{8\\}$ , z = - $\frac{123}{40}$

3 0

3 years ago

Please answer this very simple and easy attachment I will say what each choose is down below! The chooses have 4 options each ex

Bas_tet [7]

Answer:

1st choose: Rounded

2nd Choose: 36

3rd Choose: 6

Step-by-step explanation:

1st Choose: You want rounded numbers because it makes the problem simpler.

2nd Choose: 35 3/4 rounds to 36.

3rd Choose: 5 7/8 rounds to 6. 36 and 6 divides evenly.

Hopes this helps:)

7 0

3 years ago

makela plants 3/4 of her herb garden with basil and 1/4 with sage. explain why the fraction strips show that the whole garden is

KonstantinChe [14]

The garden has four quarters. three quarters are planted with basil. one quarter is planted with sage. The strips represent quarters. So that means that three strips represent three quarters. Well one strip represents one quarter.

5 0

4 years ago

Read 2 more answers

How did you figure out the answers ? how did you work it out ?

Maksim231197 [3]

How did who figure out what answer?

7 0

4 years ago

Solve for n 20 > -4x - 8

yan [13]

Answer:

x > -7

Step-by-step explanation:

20 + 8 > -4x

Simplify

28 > -4x

Divide both sides by 4

-28/4 < x

-7 < x

x > -7

5 0

3 years ago