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3 years ago

Find the sum of 10x^2-10x-6 and x+6.

Mathematics

1 answer:

Andre45 [30]3 years ago

3 0

Answer:

10x²−9x

Step-by-step explanation:

10x²−10x−6+x+6

=10x²−10x−6+x+6

Combine Like Terms:

=10x²−10x−6+x+6

=(10x²)+(−10x+x)+(−6+6)

=10x²−9x

Hope this helps!

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lorena lifeguards at a lap pool that is 25 yards long, 10 ards wide, and 2 yards deep. There is a drain around he entire top edg

Varvara68 [4.7K]

The true statements about the pool are

The drain is best measured using perimeter
The area of the cover is 250 square yards
One edge of the pool measures 10 yd

<h3>How to determine true statements?</h3>

The given parameters are:

Length = 25 yards
Width = 10 yards
Depth = 2 yards

To measure the drain, we simply calculate the perimeter of the edge of the pool.

This means that (a) is correct

When the volume is calculated, the unit is cubic yard or yd³.

This means that (b) is wrong

The area of the cover is:

Area = Length * Width

This gives

Area = 25 yards * 10 yards

Evaluate

Area = 250 square yards

This means that (c) is correct

The length of the drain is calculated as:

Perimeter = 2 *(Length + Width)

This gives

Perimeter = 2 * (25 + 10)

Evaluate

Perimeter = 70

This means that (d) is wrong

Lastly (e) is correct, because the width of pool is 10 yards

Read more about perimeter and volume at:

brainly.com/question/15465114

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7 0

2 years ago

HELP PLEASE (and explain if you can what is 5cd when c = 3 and d = 4

rjkz [21]

what is 5cd when c = 3 and d = 4

put the value c=3 and d=4 then,

5cd= 5 × 3 × 4

 = 60 

thus , 60 is the required answer..........

4 0

3 years ago

Solve y2 = 64, where y is a real number. Simplify your answer as much as possible.

Amanda [17]

Answer:

See step by step

Step-by-step explanation:

If you are referring to

$y {}^{2} = 64$

Then the answer is 8 or -8,

If you are referring to

$y \times 2 = 64$

Then answer is 32 or -32 it depends on which one you are referring to.

4 0

3 years ago

John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages

oksano4ka [1.4K]

Answer:

John’s age is 8 years

Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

$x=5y$ -----> equation A

$y=2z$

$z=y/2$ -----> equation B

$(x+2)+(y+2)+(z+2)=58$

$x+y+z+6=58$

$x+y+z=52$ -----> equation C

Substitute equation A and equation B in equation C and solve for y

$5y+y+y/2=52$

Multiply by 2 both sides to remove the fraction

$10y+2y+y=104$

$13y=104$

$y=8$

Find the value of x

$x=5(8)=40$

Find the value of z

$z=8/2=4$

therefore

John’s father's age is 40 years

John’s age is 8 years

John’s sister's age is 4 years

7 0

3 years ago

A line that is parallel to the line y=3x-8 and passes through the point (-1,6)

lesya [120]

Answer:

y = 3x + 9

Step-by-step explanation:

If the line is parallel, that means it will have the same slope. So, the line will also have a slope of 3.

Using y = mx + b, plug in the slope and given point, and solve for b:

y = mx + b

6 = 3(-1) + b

6 = -3 + b

9 = b

Plug in the slope and b into y = mx + b

y = 3x + 9

So, the equation of the parallel line is y = 3x + 9

3 0

3 years ago