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Ray Of Light [21]
3 years ago
13

Is the following expression true or false? Show your work.

Mathematics
1 answer:
SOVA2 [1]3 years ago
7 0

Answer:

The expression is true.

Explanation:

 (x^2+8x+16)(x^2-8x+16)=(x+4)^2(x-4)^2=((x+4)(x-4))^2

 We know that (a +b)(a-b) = a²-b²

 So we have ,

      ((x+4)(x-4))^2=(x^2-4^2)^2=(x^2-16)^2

 Which is Right Hand Side  given.

So, the expression is true.

 

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The area of a right triangle is 210 square inches. The height of the right triangle is 35 inches.
Semmy [17]

Answer:

37 inch

Step-by-step explanation:

Area of ∆ = ½ height x base

210 = ½ x 35 x base

12 = base

Using Pythagoras theorem,

=> hypotenuse = √height² + base²

=> hypotenuse = √35² + 12² = 37

7 0
3 years ago
A patient is given a solution containing 0.625 g of calcium carbonate. If the calcium carbonate solution contains 1250 mg per 5
Dmitrij [34]

Answer: 2.5 mL

Step-by-step explanation:

Given : A patient is given a solution containing 0.625 g of calcium carbonate.

i.e. Patient required calcium carbonate = 625 mg  [∵ 1 g = 1000 mg]

Let x be the amount of solution ( in millimeters) given to the patients.

Ratio of amount of calcium carbonate (mg) to amount of solution (ml) =\dfrac{625}{x}

If the calcium carbonate solution contains 1250 mg per 5 mL,

Then, Ratio of amount of calcium carbonate to amount of solution =\dfrac{1250}{5}

By using proportion we have :-

\dfrac{625}{x}=\dfrac{1250}{5}\\\\\Rightarropw\ x=\dfrac{5\times625}{1250}=2.5

Hence, 2.5 mL solution were given to the patient.

3 0
3 years ago
one recipe for pancakes says to use 1 1/2 cups of mix to make 7 pancakes. How much mix is needed to make 35 pancakes
rosijanka [135]
The answer is 7 1/2 cups of mix.
3 0
3 years ago
Read 2 more answers
There are six people at a bus stop. Each person is half the age of the next person in line. The mean age of the group is 21. How
Mice21 [21]

Answer:

The youngest person is 2 years old

Step-by-step explanation:

There are six people at a bus stop.

We are told that:

The mean age of the group is 21.

The total number of people is 6 people

Hence:

The total sum of their ages is 21 × 6

= 126

Each person is half the age of the next person in line.

Let the age of the first person be = x

The age of the second person = x/2

The age of the third person = x/2 ÷ 2 = x/2 × 1/2 = x/4

The age of the fourth person = x/4 ÷ 2

x/4 × 1/2 = x/8

The age of the fifth person = x/8 ÷ 2

x/8 × 1/2 = x/16

The age of the sixth person = x/16 ÷ 2

x/16 × 1/2 = x/32

Hence:

x + x/ 2 + x/4 + x/8 + x/16 + x/32 = 126

Lowest Common Denominator is 32

32x + 16x + 8x + 4x + 2x + x/32 = 126

63x /32 = 126

Cross Multiply

63x = 126 × 32

63x = 4032

x = 4032 /63

x = 64 years

Hence, the age of the first person is 64 years.

The age of the youngest person which is the sixth person is :

x/32

= 64/32

= 2 years

7 0
3 years ago
Which of the following isn't equivalent to -1.2 + 6?
defon
The answer is D. -1 (1.2 + 6)
8 0
2 years ago
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