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3 years ago

- Find the difference of 8x and twice the sumof x and 7. Write your answer in simplestform.

Mathematics

1 answer:

9966 [12]3 years ago

5 0

Answer:

7*2=14 8x=8*8=64*2

Step-by-step explanation:

Thats how you basically do it now try it!

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In ΔXYZ, ∠X=82° and ∠Y=84°. ∠XWZ=90° and XY=97. Find the length of XW to the nearest integer.

ivanzaharov [21]

Check the picture below to the left, let's use those sides with the law of sines

$\textit{Law of sines} \\\\ \cfrac{sin(\measuredangle A)}{a}=\cfrac{sin(\measuredangle B)}{b}=\cfrac{sin(\measuredangle C)}{c} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{sin(14^o)}{97}=\cfrac{sin(84^o)}{XZ}\implies XZ = \cfrac{97\cdot sin(84^o)}{sin(14^o)}\implies XZ \approx 398.76 \\\\\\ \stackrel{\textit{now using SOH CAH TOA}}{cos(82^o) = \cfrac{XW}{XZ}}\implies XZcos(82^o)=XW \\\\\\ 398.76cos(82^o)\approx XW\implies 55.497\approx XW\implies \stackrel{\textit{rounded up}}{55=XW}$

7 0

2 years ago

What is the correct first step to solve this system of equations by elimination?

storchak [24]

$\bold{\huge{\pink{\underline{ Solution }}}}$

$\bold{\underline{ Given }}$

We have given two linear equations that is 2x - 3y = -6 and x + 3y = 12 .

$\bold{\underline{ To \: Find }}$

We have to find the value of x and y by elimination method.

$\bold{\underline{ Let's \: Begin }}$

$\sf{ 2x - 3y = -6 ...eq(1)}$

$\sf{ x + 3y = 12 ...eq(2)}$

Multiply eq( 2 ) by 2 :-

$\sf{ 2( x + 3y = 12 )}$

$\sf{ 2x + 6y = 24 }$

Subtract eq(1) from eq(2) :-

$\sf{ 2x + 6y -( 2x - 3y) = 24 -(-6)}$

$\sf{ 2x + 6y - 2x + 3y = 24 + 6 }$

$\sf{ 9y = 30 }$

$\sf{ y = 30/9}$

$\sf{\red{ y = 10/3}}$

Now, Subsitute the value of y in eq( 1 ):-

$\sf{ 2x - 3(10/3) = -6 }$

$\sf{ 2x - 10 = -6 }$

$\sf{ 2x = -6 + 10}$

$\sf{ x = 4/2}$

$\sf{\red{ x = 2}}$

Hence, The value of x and y is 2 and 10/3

6 0

2 years ago

Select the correct answer

Tcecarenko [31]

Answer:

C. 150

Step-by-step explanation:

It's right on Plato.

4 0

3 years ago

2 + 31 X To + 14 x 10 2.345 100 O I

Ne4ueva [31]

Answer:

12-12=21

Step-by-step explanation:

i think it is that

6 0

3 years ago

Which set of numbers is the most reasonable to describe the temperature in alaska during the winter?

Zielflug [23.3K]

The rational numbers are the positive counting numbers: 1, 2, 3, 4, . . .

The whole number are the natural numbers plus 0: 0, 1, 2, 3, . . .

The irrational numbers are the numbers which cannot be expressed in the form a/b where a and b are integers. They are usually in the form of a non recurring and non terminating decimals.

The integers complices of both the negative and the positive whole numbers.

In winter, the temperature of Alaska usually drop to negative numbers.

Therefore, the set of numbers is the most reasonable to describe the temperature in alaska during the winter is the set of integers.

5 0

3 years ago

Read 2 more answers

- Find the difference of 8x and twice the sumof x and 7. Write your answer in simplestform.​

- Find the difference of 8x and twice the sumof x and 7. Write your answer in simplestform.