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3 years ago

Determine the value of y in the equation: -5y-9=-(y-1) (show all work)

1 answer:

8 0

1) -5y - 9 = - (y - 1)

2) solve the parenthesis of the right side

-5y - 9 = - y + 1

3) add 5y to both sides

5y - 5y - 9 = -y + 5y + 1

- 9 = 4y + 1

4) Subtract 1 from both sides

-9 - 1 = 4y + 1 - 1

-10 = 4y

5) Divide both sides by 4

-10 / 4 = 4y/4

- 2.5 = y

Answer: y = - 2.5

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Karo-lina-s [1.5K]

$\text{The scientific notation:}\\\\a\times10^n\\\\1\leq a$

$a.\\(5\times10^3)\times(3.5\times10^{-1})=(5\times3.5)\times(10^3\times10^{-1})\\\\=15.75\times10^{3+(-1)}=15.75\times10^2=1.575\times10\times10^2\\\\=1.575\times10^{1+2}=\boxed{1.575\times10^3}$

$b.\\(8\times10^2)\div(4\times10^3)=(8\div4)\times(10^2\div10^3)=2\times10^{2-3}\\\\=\boxed{2\times10^{-1}}$

$c.\\(6\times10^{-3})^2=6^2\times(10^{-3})^2=36\times10^{-3\cdot2}=36\times10^{-6}=3.6\times10\times10^{-6}\\\\=3.6\times10^{1+(-6)}=\boxed{3.6\times10^{-5}}$

$Used:\\\\a^n\times a^m=a^{n+m}\\\\a^n\div a^m=a^{n-m}\\\\(a^n)^m=a^{n\cdot m}$

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svp [43]

A 80 square meter I’m not quite sure

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2 years ago

Solve for x<br> Pls help

Anni [7]

Answer:

Hey mate....

Step-by-step explanation:

This is ur answer.....

first we need to find the angle that is above 63 degrees, it will be much easier to know the next one....

= (Supplementary angle) 180 - 63

= 117

Expression = 23x + 2

= 23 x ? + 2

= (Multiplication of 23)

= 23 x 5 + 2

= <u>117</u>

SIMPLE!

Have a look on the pic given below....

HOPE IT HELPS!

MARK ME BRAINLIEST....

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2 years ago

Help! I’ll mark you brainly and give extra points!!

irina1246 [14]

Answer:

Slope: 2

y-intercept: (0, -4)

x y

0 -4

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Hope this helps! Can I have Brainliest please?

See attachment below:

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2 years ago

Read 2 more answers

Find the length of the highlighted arc. Round your answer to the nearest tenth. *

Firlakuza [10]

Answer:

Approximately 23.6

Step-by-step explanation:

So first find the fraction of the whole circumference the arc is.

270 ÷ 360 = 0.75

The circumference is 10π

0.75 * 10π = 7.5π

7.5π = 23.5619449019 ≈ 23.6

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2 years ago