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3 years ago

Write each phrase as an algebraic expression.

Mathematics

1 answer:

meriva3 years ago

8 0

Answer:

34+x, 2a, m-4, x÷12

Step-by-step explanation:

1) 34+n =

34 + number

2) 2a =

2 x Apple

3) m-4 = a

mary - 4 = age

x÷12

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What is the rule for the sum of angles?

Greeley [361]

Answer: Memorise the rule that the sum of the interior angles of a polygon = (n-2) × 180°, and that each interior angle of a regular polygon can be calculated by the rule: (n-2) × 180° / n, where 'n' refers to the number of sides.

Step-by-step explanation:

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4 years ago

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Whats the point of intersection between these two lines?<br><br>x+y=10<br>x+2y=14

Yakvenalex [24]

You have to make an equation that i forgot what was called but you just take
x+y=10 and multiply it by -2 so the y’s can cancel out

so you’ll end up with:

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4 years ago

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A total of $27,000 is invested, part of it at 12% and the rest at 13%. The total interest after one year is $3385. How much was

Sveta_85 [38]

The amount invested in each rate are $14500 and $12500 respectively;

Let the amount invested in each be P1 and P2

Let the individual interest be I1 and I2 respectively;

I1 = P1R1T/100

I2 = P2R2T/100

If a total of $27,000 is invested, then;

P1 + P2 = 27000 ........... 1

If the total interest after one year is $3385, then;

I1 + I2 = 3385

$\frac{P_1(12)(1)}{100} + \frac{P_2(13)(1)}{100} = 3385\\0.12P_1+0.13P2=3385\\12P_1 + 13P_2=338500 ........................... 2$

Solving equations 1 and 2 simultaneously;

P1 + P2 = 27000 ........... 1 * 12

12P1 + 13P2 = 338500 ........... 2 * 1

________________________________

12P1 + 12P12 = 324000

12P1 + 13P2 = 338500 ...

Subtract both equations

12P2 - 13 P2 = 324000 - 338500

-P2 = -14500

P2 = 14500

Recall that P1 + P2 = 27000

P1 = 27000 - P2

P1 = 27000 - 14500

P1 = 12500

Hence the amount invested in each rate are $14500 and $12500 respectively;

Learn more here: brainly.com/question/19088526

7 0

3 years ago

FIRST CORRECT ANSWER GETS BRAINLIEST PLS HELP

Ganezh [65]

Answer:

57.75

Step-by-step explanation:

Doug did clean 1 3/4 hour.

Doug did paperwork for 2 1/3 hour

Doug did serving for 1 5/12

Add 1 3/4+ 2 1/3+1 5/12=16/12 or 5.5 hrs

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Therefore in 5.5 hour Doug earns 5.5 $ 10.50 = $ 57.75

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3 years ago

Write an equation for the word sentence.<br> Eight more than the number of children is 24.

DaniilM [7]

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4 years ago