MATHEMATICS MIDDLE SCHOOL

What is 3{5[10+5(500-100)+399]} equal to?

Answers

Answer 1

Answer: 500-100=400
5(400)=2000
399+10=409
2000+409=2409
5(2409)=12045
3(12045)=36135
So it is equal to 36135

Answer 2

Answer:

Answer:

36,135

Step-by-step explanation:

Okay. Handle 500-100 first. That brings it to 3{5[10+5(400)+399]}. Next, Handle 5(400). That brings you to 3{5{10+2,000+399]}. Then handle all the addition. That leads to 3[5(2,409)]. Next, configure 5(2409). That leads to 3(12045). Then do that one which ends as 36,135 for a final answer.

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WILL MARK BRAINLEST HELP ASAP!!!!!

Answers

Answer:

Area of the rectangle is 10x²+7-6

Step-by-step explanation:

Area of rectangle is the product of its length and width

As length of given rectangle is 5x+6 and its width is 2x-3 the are is

(5x+3)(2x-3)

=5x·2x-5x+6·2x-6

=10x²-5x+12x-6

=10x²+7x-6

Answer: 10x^2+7x-6

(5x+6) * (2x-1)

10x^2-5x+12x-6

10x^2+7x-6

(Simple DMAS rules )

hope this helps :)

What are the roots of the equation x^2+6x-9=0

Answers

Answer:

The roots of the quadratic equation are

$x=-3+3√(2)$

$x=-3-3√(2)$

Step-by-step explanation:

we have

$x^(2) +6x-9=0$

we know that

The formula to solve a quadratic equation of the form $ax^(2) +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^(2)-4ac}} {2a}$

in this problem we have

$x^(2) +6x-9=0$

$a=1\nb=6\nc=-9$

substitute in the formula

$x=\frac{-6(+/-)\sqrt{6^(2)-4(1)(-9)}} {2(1)}$

$x=\frac{-6(+/-)√(72)} {2}$

$x=\frac{-6(+/-)6√(2)} {2}$

$x=-3(+/-)3√(2)$

$x=-3(+)3√(2)$

$x=-3(-)3√(2)$

Given equation is :

$x^(2)+6x-9=0$

We will solve this quadratic equation, using the formula:

$x1,2=\frac{-b+\sqrt{b^(2)-4ac}}{2a}$ and

$x1,2=\frac{-b-\sqrt{b^(2)-4ac}}{2a}$

Now, putting a=1 , b=6 and c =-9 we get

$x=\frac{-6+\sqrt{6^(2)-4*1(-9)}}{2*1}$ and

$x=\frac{-6-\sqrt{6^(2)-4*1(-9)}}{2*1}$

Final solutions are: $x=3(√(2)-1)$ and

$x=-3(√(2)+1)$

2 3 • 2 4 is equal to _____.a. seven factors of two
b. two factors of seven
c. 12 factors of two
d. two times 12

Answers

A. seven factors of 2

when multiplying exponents with the same base the exponents add

Irene is going to read a 216-page book. If she reads at a rate of 18 pages per day, how many days will it take her to read 1/3 of the book?

Answers

It will take her 4 days to read 1/3 of the book.

The answer is 4.

216pg ÷ 3 = 72

72pg ÷ 18pg per day = 4 days

The answer is 4 days.

A teaspoon of common table salt contains about 2,000 mg of sodium. how many grams of sodium is this?

Answers

Answer:

2 grams

Step-by-step explanation:

multiply by 1000

Todd is using the benchmark 1/2 to compare fractions. Which statement is not correct. A 5/6 less than a 1/2

Answers

That's the correct answer -- 5/6 is about 0.83, while 1/2 is 0.5, so you get a clear order. Another way to compare them is writing 1/2 as 3/6, again getting an order.

That is the correct anwser because 3/6=1/2 and 5/6 is greater 1/2<5/6

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