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4 years ago

Write an expression that is equal to -(16-9)

Mathematics

2 answers:

Allushta [10]4 years ago

6 0

- (16 - 9) = -16 + 9 = - 7

statuscvo [17]4 years ago

6 0

An equivalent expression to -(16-9) would be 9-16 or -16 + 9. Solve by distribution.

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a boat takes 2 hours to travel 15 miles upriver against the current. if the rate of the boat in still water is 12 miles per hour

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Answer:

7 or 8 miles per hour

Step-by-step explanation:

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The price paid for a $83.50 chair with an 8% sales tax What is the sale tax

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Answer:

$6.68

Step-by-step explanation:

83.50(0.08) = 6.68

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3 years ago

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X =4 x+y=-6 4x - 3y + 2z = 26

slega [8]

Answer:

x = 4 ,y = -10 , z = -10

Step-by-step explanation:

Solve the following system:

{y + 4 = -6 | (equation 1)

16 - 3 y + 2 z = 26 | (equation 2)

Express the system in standard form:

{y+0 z = -10 | (equation 1)

-(3 y) + 2 z = 10 | (equation 2)

Swap equation 1 with equation 2:

{-(3 y) + 2 z = 10 | (equation 1)

y+0 z = -10 | (equation 2)

Add 1/3 × (equation 1) to equation 2:

{-(3 y) + 2 z = 10 | (equation 1)

0 y+(2 z)/3 = (-20)/3 | (equation 2)

Multiply equation 2 by 3/2:

{-(3 y) + 2 z = 10 | (equation 1)

0 y+z = -10 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{-(3 y)+0 z = 30 | (equation 1)

0 y+z = -10 | (equation 2)

Divide equation 1 by -3:

{y+0 z = -10 | (equation 1)

0 y+z = -10 | (equation 2)

Collect results:

Answer: y = -10 , z = -10

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3 years ago

Distance between (-4, -3) (2, 1)

VikaD [51]

Answer:

$\Longrightarrow: \boxed{\sf{2\sqrt{13}}}$

Step-by-step explanation:

Question:

Find the distance between (-4,-3) (2,1)

To find:

The distance between (-4,-3) (2,1).

Use the distance formula.

Distance formula:

$\Longrightarrow: \sf{\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}}$

$\sf{y_2=1}\\\\\sf{y_1=(-3)}\\\\\sf{x_2=2}\\\\\sf{x_1=(-4)}$

$\Longrightarrow: \sf{\sqrt{\left(2-\left(-4\right)\right)^2+\left(1-\left(-3\right)\right)^2}$

Solve.

$\Longrightarrow: \boxed{\sf{2\sqrt{13}}}$

Therefore, the final answer is 2√13.

I hope this helps, let me know if you have any questions.

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Naddika [18.5K]

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4 years ago