Simplify the expression.
7x2 + 3 - 5(x^2- 4)

Answer:

yes that is

Step-by-step explanation:

Answer:

4 247/290 or 4.85 ft/year

Step-by-step explanation:

93 4/5 ÷ 19 1/3 = 469/5 ÷ 58/3 = 469/5 x 3/58 = 1407/290 = 4 247/290

Im pretty sure its $32.4

Step-by-step explanation:

Answer:

1.75

Step-by-step explanation:

h(t) = -16t² + 56t

h'(t) = -32t + 56

To find time at max height equate h' to 0

0 = -32t + 56

t = 56/32 = 1.75 s

It takes 1.75 s to reach max highest point

Answer:

Perimeter

Step-by-step explanation:

Perimeter is the distance around an object. In this scenario the object in question would be Kevin's dining room.  Keyword for perimeter here is around.

Answer:

He spends 20 percent of his free time reading so I think its 1 hour and 48 minutes.

Answer: it is 2 ft

Step-by-step explanation:

because you have to do 12/3 and that equals 4 and then you have to do 4/2 and that equals 2

Answer:

The tree is about 62ft tall

Step-by-step explanation:

sin(62)=x/70

70sin(62)=x

61.8=x

Answer:

it's 128 x 72 =9,216

Step-by-step explanation:

N = 560

Answer:

-16/3

Step-by-step explanation:

I am not sure if you are aware of this but I am not sure if you are aware of the fact

Answer:

167.36 weeks

Step-by-step explanation:

Given: Currently has $180, the cost is $860, and he plans to save $68 a week

To find: How many weeks will it take to save his money

Solution: If Barry currently has $180 and needs $860 for his tires also saves $68 a week, divide the amount he wants to save by the amount he saves a week, to find how many weeks will it take to save his money

                                          860 ÷ 68 = 12.64

Subtract 180 because he already has $180 saved currently

                                           180 - 12.64 = 167.36

Hence, it will take approximately 167 weeks to save his money up to $860

Answer:

A , 10 unit square

B , 13 unit square

C , 9 unit square

D , 25 unit square

Step-by-step explanation:

I HOPE IT HELPS:))) !!!!

Answer:

2 hours, 4 hours

Step-by-step explanation:

So lets go over what we know.

There are already 10 worksheets created.

Every 1 hour 3 more are made.

27 worksheets need to be made.

Ok, the first thing we can do is subtract the amount of worksheets needed by the amount we laready have:

27-10

=

17

Now, lets divide the amount of worksheets we still need, by how many we make each hour:

17/3

=

Well, 3 goes into 15, 5 times. Then 2 is left. So we know it takes 5 2/3 hours to create all 27 worksheets.

Looking at the answers, 6 hours, 8 hours, and 10 hours would work. However 2 hours and 4 hours would not work.

Hope this helps! ;)

Answer:

ax2 + bx + c

Step-by-step explanation:

the 2 is the square

Answer:

0

Step-by-step explanation:

find mean : 2+3+4+7 divided by 4 equals 4

subtaract mean from valuses: 2-4= -2 , 3-4= -1 , 4-4= 0 , 7-4= 3 ,

find mean with new numbers: -2+-1+3+0 divided by 4 equals 0 (everything cancels out)

Answer:

1) vertical

2) adjacent

Step-by-step explanation:

so, vertical is when two different numbers are congruent and adjacent is numbers next to each other but are no congruent

Answer:

Step-by-step explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

We have

PE = 500 × 9.8 × 4

We have the final answer as

Hope this helps you

Answer:

A.  12 sq. units.

Step-by-step explanation:

Area of the triangle = 1/2 * base * height

= 1/2 * 6 * 4

= 12.

Answer:

C. 13

Step-by-step explanation:

26 ÷ 2 = 13

Let me know if that helped!

Thanks for letting me answer!

Answer:

12

Step-by-step explanation:

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Answer:

346

Step-by-step explanation:

(40*22)-(34*16)

=880-544

=346

Answer:336

Step-by-step explanation:

22x40=880 total sq ft

16x34=544 inner sq ft

880-544=336

Answer:

See attached

Step-by-step explanation:

Solution is in the attached picture

Answer:

Hello! Answer: 496

Step-by-step explanation:

When finding area for triangles we have to do base x height then divide by 2 so

62 x 16 = 992

992 ÷ 2 = 496

So 496 is our answer!

Answer:

A - 496

Step-by-step explanation:

formula for area of a triangle

[tex]a = \frac{bh}{2} [/tex]

where b = base length and h = height

The triangle shown has a base length of 62 ft and a height of 16 ft

That being said we plug in the given values into the formula

[tex]a = \frac{62 \times 16}{2} \\ 62 \times 16 = 992 \\ \frac{992}{2} = 496[/tex]

Hence the area of the triangle is 496 square feet

Answer:

$144

Step-by-step explanation:

perimeter = 4 + 4 + 4 + 4 = 16 feet

16 x 9 = $144

Answer:

40 hours

Step-by-step explanation:

Time=Distance/Speed

Time=1800/45

Time=40 hrs

Answer:

[tex]40h[/tex]

Step-by-step explanation:

[tex]speed = \frac{distance}{time} \\ time = \frac{d}{s} \\ = \frac{1800km}{45kmh ^{ - 1} } \\ = 40h[/tex]

hope this helps you.

Can I have the brainliest please?

Have a nice day!

Answer: d

Step-by-step explanation:

The membership increases by 50 members in each of the six warmest months and decreases by 50 members in each of the other six months

Answer:

Please check explanations

Step-by-step explanation:

To find the volume of the surface area of a cone, we need to use the height and not the slant height of the cone

The slant height, the height and the base radius forms a right triangle with the slant height being the hypotenuse of this triangle

By Pythagoras’ theorem, the square of the hypotenuse (slant height) equals the sum of the squares of the two other sides

6.5^2 = 2.5^2 + h^2

h^2 = 36

h = √36

h = 6 cm

So we have the volume as;

V = 1/3 * pi * r^2 * h

where r in this case is base radius of 2.5 cm

V = 1/3 * pi * 2.5^2 * 6 = 39.3 cm^3