3 years ago

HELP!!! I dont understand this!!! (BRAINLIEST)

Mathematics

1 answer:

Elden [556K]3 years ago

6 0

I think it’s b also

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Simplify the expressions by combining like terms<br><br> 1.5r - 3r + 8r + 2.5r

Tomtit [17]

Answer:

Step-by-step explanation:

1.5r - 3r + 10.5r

10.5r + 1.5r = 12r

12r - 3r = 9r

Final Answer = 9r

5 0

3 years ago

A chemist is using 333 milliliters of a solution of acid and water. If 19.6% of the solution is acid, how many milliliters of ac

sesenic [268]

65.27mm of acid is present in solution.

Step-by-step explanation:

Given,

Quantity of solution = 333mm

Acid Percentage = 19.6%

Quantity of acid = 19.6% of Quantity of Solution

$Quantity\ of\ acid=\frac{19.6}{100}*333\\Quantity\ of\ acid=\frac{6526.8}{100}\\Quantity\ of\ acid=65.27mm$

65.27mm of acid is present in solution.

Keywords: Percentage

Learn more about percentages at:

#LearnwithBrainly

3 0

3 years ago

18=3-3a what’s the steps

Harrizon [31]

Answer:

a=-5

Step-by-step explanation:

subtract 3 from both sides

15=-3a

divide by -3

a=-5

6 0

3 years ago

Rearrange the formula V = 2πr/T for r.

Zielflug [23.3K]

$V =\dfrac{2\pi r}{T}\quad|\cdot T\\\\\\TV=2\pi r\quad|:2\pi\\\\\\\boxed{\dfrac{TV}{2\pi}=r}$

Answer D.

3 0

4 years ago

Read 2 more answers

(9\times100)+(8\times10)+\left (7\times\dfrac{1}{1000} \right )(9×100)+(8×10)+(7×

Tanya [424]

Answer:

7,980

Step-by-step explanation:

900 + 80 + (7 x 1000)

3 0

3 years ago