3 years ago

What are the answers?

Mathematics

1 answer:

lina2011 [118]3 years ago

6 0

Heres the first 9 problems im on a time

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5m + 10 - 2m - 5 Simplify

crimeas [40]

Answer:

3m + 5

Step-by-step explanation:

Just add like terms. ( 5m - 2m) (10 - 5)

7 0

3 years ago

Read 2 more answers

50 POINTS!!!43 what is 43 7/8% of $2.35? Round your answer to the nearest cent

Natasha2012 [34]

Answer:

$1.03

Step-by-step explanation:

7/8 = 0.875

then

43 7/8 = 43.875%

43.875/100 = 0.43875

2.35 * 0,43875 = 1.031

Round to the neares cent:

1.03

4 0

3 years ago

Read 2 more answers

Solve the absolute value equation |8|=28

DENIUS [597]

The answer is false. This is because 8 does not equal the number 28.

Explination:

|8| = 28

8≠28

7 0

3 years ago

A square outdoor patio with side length x feet is surrounded by a brick walkway that is 4 feet wide. What is the area of the wal

Masja [62]

Answer:

Area of walkway = 16(x+4) $ft^{2}$

Step-by-step explanation:

Length of the sides of the square outdoor = x feet

Area of the square outdoor = length x length

= x * x

= $x^{2}$ $ft^{2}$

The square outdoor is surrounded by 4 feet of walkway. So that,

length of the walkway = (x + 2(4))

= (x + 8)

Area of walkway with outdoor = (x + 8)*(x + 8)

= ( $x^{2}$ + 16x + 64) $ft^{2}$

Area of walkway = Area of walkway with outdoor - Area of the square outdoor

= ( $x^{2}$ + 16x + 64) - $x^{2}$

= 16x + 64

Area of walkway = 16(x+4) $ft^{2}$

7 0

3 years ago

Prove (cosx+cosy)^2+(sinx-siny)^2 = 2+2cos(x+y)

hram777 [196]

Here you go:
1) Applying (a + b)² = a² + b² + 2ab,
(cosx + cosy)² = cos²x + cos²y + 2cos(x)*cos(y) and
(sinx + siny)² = sin²x + sin²y + 2sin(x)*sin(y)

2) ==> (cosx + cosy)² + (sinx + siny)² =
= (cos²x + sin²x) + (cos²y + sin²y) + 2{cos(x)cos(y) + sin(x)sin(y)}
= 2 + 2{cos(x - y)} = 2[1 + cos(x - y)]
= 2*2cos²{(x - y)/2} [Multiple angle identity, 1 + cos(2A) = 2cos²A]
= 4*cos²{(x - y)/2} [Proved]

7 0

3 years ago