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3 years ago

Find the value of -20+ (-100)-(-100)+(-150)-300

Mathematics

2 answers:

ioda3 years ago

8 0

Answer:

- 470.

Step-by-step explanation:

-20+ (-100)-(-100)+(-150)-300

Distributing the negative over the parentheses (recall that <u>-* - = +</u> and <u>- * + = -</u>)

= -20 - 100 + 100 - 150 - 300

= 100 - 100 - 20 - 150 - 300

= 100 - 570

= - 470.

d1i1m1o1n [39]3 years ago

6 0

Answer:

=−470

Step-by-step explanation:

−20−100−(−100)−150−300

=−120−(−100)−150−300

=−20−150−300

=−170−300

=−470

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Charles Miller invested his textbook royalty income in two accounts, one paying 3% annual simple interest and the other paying 2

yKpoI14uk [10]

Answer:

The amount invested at 3% is 300 &

The amount invested at 2% is 100.

Step-by-step explanation:

Total yearly interest for the two accounts is: $11

Let x be the amount invested at 3%

& y be the amount invested at 2%

From the question we can get 2 equations as;

x = 3y --------------------------Equation 1

0.03x + 0.02y = 11 ----------Equation 2

Substitute for x in Equation 2 we get;

0.03 (3y) + 0.02y = 11

0.09y + 0.02y = 11

0.11y = 11

Divide the above equation by 0.11, we get;

y = $\frac{11}{0.11}$

y = 100

Let us substitute the value of y in Equation 1 we get;

x = 3(100)

x = 300

Now to check our answer let us put in the simple interest formula. If we get the sum of the two interests equal to 11 then our answers are correct:

0.03 x 300 + 0.02 x 100

= 9 + 2

= 11

Hence the amount invested at 3% is 300 and the amount invested at 2% is 100.

6 0

4 years ago

Work out the co ordinates of the midpoint of (-2,-1) and (-2,4)

s2008m [1.1K]

Answer:

$(-2,\frac{3}{2})$

Step-by-step explanation:

To find the midpoint, simply use the Midpoint Formula.

The Midpoint Formula states that for two points $(x_1,y_1)$ and $(x_2,y_2)$ , the midpoint will be: $(\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2} )$ .

So, here, $(x_1,y_1)$ = (-2, -1) and $(x_2,y_2)$ = (-2, 4). The midpoint is then: $(\frac{-2+(-2)}{2} ,\frac{-1+4}{2} )=(\frac{-4}{2} ,\frac{3}{2} )=(-2,\frac{3}{2})$

Thus, the answer is $(-2,\frac{3}{2})$ .

Hope this helps!

4 0

3 years ago

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Aleonysh [2.5K]

59.952 in the nearest tenth is 60

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3 years ago

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The mean is a good oda population?

allsm [11]

point estimate hope it helps

8 0

4 years ago

Deon bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $250 less than the desktop. He pai

zysi [14]

Answer:

300

Step-by-step explanation:

Let x = cost of desktop computer; then x - 250 = cost of laptop computer

converting % to decimals, 9% = 0.09 and 6% = 0.06

Then, 0.09x + (x - 250)0.06 = $300

0.09x + 0.06x - 15 = $300

0.15x = $315

x = $2100

then x - 250 = $1850

Proof: $2100•0.09 + 1850•0.06 = $189 + $111 = $300

7 0

3 years ago