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3 years ago

8

What’s the answer to this? You have to estimate

2 answers:

Lesechka [4]3 years ago

6 0

<h2>I think is: 254.173</h2>

Because i answer with the calculator.

bazaltina [42]3 years ago

4 0

0.19579831 (that's what my math app said the estimate was)

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The product of 5 and twice a number

Stells [14]

Product means multiply so:

5(2n)
=10n

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3 years ago

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Write 9 decimals with three decimal places that when rounded to the nearest tenth round to 1.3

zmey [24]

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3 years ago

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System of Equations <br> Need help<br> Trig

Yanka [14]

Looks like the system is

$\begin{cases}-2x+y+6z=1\\3x+2y+5z=16\\7x+3y-4z=11\end{cases}$

We can eliminate $y$ by taking

$(3x+2y+5z)-2(-2x+y+6z)=16-2(1)$

$\implies3x+2y+5z+4x-2y-12z=16-2$

$\implies7x-7z=14$

$\implies x-z=2$

so that $z=x-2$ , and

$(7x+3y-4z)-3(-2x+y+6z)=11-3(1)$

$\implies7x+3y-4z+6x-3y-18z=11-3$

$\implies13x-22z=8$

Substitute $z=x-2$ into this last equation and solve for $x$ :

$13x-22(x-2)=8$

$\implies13x-22x+44=8$

$\implies-9x=-36$

$\implies x=4$

Then

$z=x-2$

$\implies z=4-2$

$\implies z=2$

Plug these values into any one of the original equation to solve for $y$ :

$-2x+y+6z=1$

$\implies-2(4)+y+6(2)=1$

$\implies-8+y+12=1$

$\implies y=-3$

Hence the solution is x = 4, y = -3, and z = 2.

6 0

4 years ago

Colin pays £766.45 a year on his car insurance.

Firlakuza [10]

Answer:

£807.8383

Step-by-step explanation:

100 plus 5.4= 1.054%

1.054 x £766.45=£807.8383

7 0

3 years ago

13/18 - 5/8 in simplest form Help!

sdas [7]

Answer:

7÷72

Step-by-step explanation:

First take lcm of the denominator

Then solve

(13*4-5*9)/73

52-45/72

7/72

6 0

3 years ago