MATHEMATICS
MIDDLE SCHOOL

Answer:

You need to put together the numbers that have the same variables

in this case 3x and 9x

3x+9x= 12x

As there is just one y you leave it like that

so the answer is

12x-8y

MIDDLE SCHOOL

Round 6,877 to the nearest whole number.

When you round that number you get 7,000

HIGH SCHOOL

The area (A) of a circle is a function of its radius (r) and is given by the function A = f(r) = πr2. What is the domain of this function? A. all positive real numbers

B. all real numbers

C. all positive real numbers including 0

D. all real numbers excluding fractions

C.all positive real numbers including 0

It would be C hope that helps

HIGH SCHOOL

How much : 100-99+98-97+....+4-3+2-1 = ?

100-99=1

1+98= 99

99-97= 2

2+4=6

6-3= 3

3+2=5

5-1=4

1+98= 99

99-97= 2

2+4=6

6-3= 3

3+2=5

5-1=4

HIGH SCHOOL

A motorcycle cost $12,000 when it was purchased. The value of a motorcycle decreases by 6% each year. Find the rate of decay each month and select the correct answer below. -0.005143%

-0.5143%

-0.005%

-0.5%

6/12=0.5%

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HIGH SCHOOL

Name the property the equation illustrates

(ab)3 = a(b3)

The answer is Associative property of multiplication

HIGH SCHOOL

Factor completely x2 − 36

X² - 36 = x² - 6² = (x-6)(x+6)

Hey love!

MIDDLE SCHOOL

Expanding and Simplifying Triple Brackets: (3x + 8) (x + 6)

Please help!

Thankyou all! Xx

(3x+8) (x+6)= 3x^2+18x+8x+48=

3x^2+26x+48

Answer:

Step-by-step explanation:

3x(x+6)+8(x+6)

3x^2+18x+8x+48

3x^2+26x+48

MIDDLE SCHOOL

PLEASE Find an upper limit for the series 2x^4-7x^3+4x^2+7x-6=0

A. -1

B. 4

C. 5

Answer:

A. -1

Step-by-step explanation:

2x⁴ - 7x³ + 4x² + 7x - 6

2(1) - 7(-1) + 4(1) + 7(-1) - 6

2 + 7 + 4 - 7 - 6 = 0

6 + 7 - 7 - 6 = 0

2(256) - 7(64) + 4(16) + 7(4) - 6 = 0

512 - 448 + 64 + 28 - 6 = 0

604 - 454 is not equal to 0

2(625) - 7(125) + 4(25) + 7(5) - 6 = 0

1385 - 881 is not equal to 0

MIDDLE SCHOOL

the depth of a river changes by 7/10 foot on Friday , 7/8 foot on Saturday and -11/15 on sunday. on which day does the river depth decrease the most

Answer:

Answer is on Sunday the river depth decreases the most.

Step-by-step explanation:

Given that the depth of river changes

It is not given increase or decrease

But by convention, normally if positive sign for change means increase and negative sign means decrease.

Since Friday and Saturday show change by positive values namely 7/10 and 7/8 feet. we can say that change is increase

But On Sunday, the change is negative =-11/15

This implies 11/15 feet decreases

Hence this is the highest of all the three

Answer is on Sunday the river depth decreases the most.

(Because it is the only day where decrease takes place)

Answer:

The river depth decrease the most on Sunday

Step-by-step explanation:By solving the fractions

Friday = 7/10 = 0.7

Saturday = 7/8 = 0.87

Sunday = -11/15 = -0.73

So as we see the Sunday value is negative and it is least as compared to others so this is the most decreased depth.