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3 years ago

I need help- I’ll give brainlist if it’s right

Mathematics

2 answers:

Sav [38]3 years ago

5 0

Answer:

D. x > 4

Step-by-step explanation:

You have to do the opposite operations to get the variable on one side of the equation by itself.

4 - x + 4 = 8 - 4

x = 4

You only switch the comparison sign if you mutliply or divide by negative numbers when you do opposite operations to get the variable on one side of the equation by itself.

I hope this helps!

likoan [24]3 years ago

3 0

Answer:

D. x>[4]

Plzzzzz give me Brainliest!!!!!

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Your patio is 12 feet by 15 feet. After remodeling, the new dimensions are 18 feet by 22 feet. By how many square feet have you

Mashutka [201]

<h3>Answer: 216 square feet</h3>

Work Shown:

Old area = 12*15 = 180 square feet

New area = 18*22 = 396 square feet

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The patio's area increased by 216 square feet.

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2 years ago

Jenna manipulated the equation 4x + 7=10 by adding -7 to both sides.Which of the follolwing properties justifies this manipulati

elena-14-01-66 [18.8K]

The addition property of equality justifies this. You could also say that she simply subtracted 7, and then it would be the subtraction property of equality. This is the case because if you add or subtract (or multiply or divide) the same number on both sides of an equation, the equation will still be the same.

Hope it helps!

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3 years ago

I need help with all three please help!

denis-greek [22]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Please answer thank you !!!

BartSMP [9]

Answer:

-3x³ - 4x² + x - 9

Step-by-step explanation:

-5x³ + 2x² + x - 7

- (-2x³ + 6x² + 0 + 2) remember: when you subtract, you 'add the opposite'

-3x³ + (-4x²) + x + (-9)

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3 years ago

Plutonium-240 decays according to the function where Q represents the quantity remaining after t years and k is the decay consta

taurus [48]

Note: a radioactive decay constant is always negative.

time = [natural log(ending amount / beginning amount)] / k
time = ln (20 / 24) / -.00011
time = ln (5/6) / -.00011
time = -.018232155683 / -.00011
time = 165.7468698455 
time = 165.75 years

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3 years ago

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