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Genrish500 [490]
3 years ago
5

Multiply (2m + 7) (2m – 7)

Mathematics
1 answer:
aivan3 [116]3 years ago
4 0

Answer:

4m^2 -49

Step-by-step explanation:

(2m + 7) (2m – 7)

FOIL

first 2m*2m = 4m^2

outer  2m *-7 = -14m

inner 7 *2m = 14m

last  7*-7 = -49

Add them together

4m^2 -14m+14m -49

Combine like terms

4m^2 -49

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Work the following area application problem.
Nookie1986 [14]

SInce you need 1.5 feet of overhang, add 3 feet to each axis dimension 1.5 on each side):

Minor Axis = 18 + 3 = 21 feet

Major axis = 25 + 3 = 28 feet


The area of an ellipse is found by multiplying half the minor axis by half the major axis by PI.


1/2 minor axis = 21 / 2 = 10.5

1/2 major axis = 28 / 2 = 14

Using 3.14 for PI

Area = 10.5 x 14 x 3.14 = 147 x 3.14 = 461.6 sq ft

7 0
4 years ago
Read 2 more answers
What is the equation of a line that passes through the point (2, 7) and is perpendicular to the line whose equation is y=x/4+5 ?
worty [1.4K]

Answer:

y = -4x+15

Step-by-step explanation:

y=x/4+5 may be presented as y = 1/4 x + 5, where a=1/4, b=5

swapping numerator and denominator and inserting an opposite sign in a=1/4, we have:

1/4 --------> 4/1 -------> -4/1 = -4

y = -4x+n

Point (2,7) means that x=2, y=7 substitute it to the equation y=-4x+n, calculate "n":

7=-4*2+n ------>    7=-8+n ------->   7+8 = n -------> 15=n

substituting n=15 to the equation y=-4x+n, we get finally y=-4x+15


8 0
4 years ago
The area of the rectangle shown is 17.36 square yards. What is the perimeter?
Nostrana [21]

Answer:

16.67

Step-by-step explanation:

Each side is about 4.167 yards so the perimeter is roughly 16.67 yards

5 0
3 years ago
Simplify the expression please!<br><br> -5+i/2i
melamori03 [73]

Answer:-9/2 or -4.

5

Step-by-step explanation:

3 0
4 years ago
Find the unit rate 42 pages
Rainbow [258]

Answer:

14 pages per day

Step-by-step explanation:

To do this, you must divide:

43 (pages)/3(days)= 14 (pages per day)

Hope this helps! :)

7 0
3 years ago
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