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makkiz [27]
3 years ago
10

Use the distributive property to multiply the following binomials

Mathematics
1 answer:
SSSSS [86.1K]3 years ago
7 0
(x+5)(x-5)
= x^2 - 5x + 5x - 25
= x^2 - 25

(5x+3)(5x-3)
= 25x^2 - 15x + 15x - 9
= 25x^2 - 9

do you see the pattern? both the coefficient on x and constant multiply together to make a perfect square and the middle term, also known as "b" term cancels out leaving a binomial
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Ice has a density of 0.92 g/cm3. What is the volume of 100 grams of ice? If the ice completely melted, what would the volume of
kicyunya [14]

Hello!

To find the volume of the water, we would need to use the density formula. The density formula is d = m/V.

In this formula, d is the density, m is the mass and V is the volume.

1. To find the volume of 100 grams of ice, we substitute the appropriate values into the formula and solve for the volume using basic algebra.

0.92g/cm³ = 100g/V (multiply both sides by V)

0.92g/cm³ · V = 100g (divide both sides by 0.92g/cm³)

V = 108.69 cm³.

The volume of 100 grams of ice is about 108.69 cm³.

2. To find the volume of the completely melted ice, we would use the same formula, but the density is now 1.00 g/mL.

1.00g/mL = 100g/V (multiply both sides by V)

1.00g/mL · V = 100g (divide both sides by 1.00g/mL)

V = 100 mL

Therefore, the volume of the melted ice is 100 mL.

<u>Final answers</u>:

  1. 108.69 g/cm³
  2. 100 mL
8 0
3 years ago
A model is made of a car. The car is 9 feet long and the model is 6 inches long. What is the ratio of the length of the car to t
velikii [3]

Answer:

B

Step-by-step explanation:

To answer this, we need to see the to see to the fact that they are both in the same unit before we can take the ratio.

Firstly, we know that 1 foot = 12 inches. 9 feet would this be 9 * 12 = 108 inches.

Now we are told to get the ratio of length of car to length of model.

This means 108:6 = 18:1

5 0
3 years ago
Read 2 more answers
4.7 x 6.8. help pls​
anzhelika [568]

Answer:

The answer is: 31.96

Step-by-step explanation:

Hope this helps! Have a nice day! Please consider making me Brainliest!

Steps: Line up the equations then solve. 4*6 is 24 and 7*8 is 56 then round, tada!

4.7 x

<u>6.8</u>

<u>24.56</u>

<u>Round: 31.96</u>

8 0
3 years ago
Read 2 more answers
Let a and b be real numbers where ab+0. Which of the following functions could represent the graph below?
8090 [49]

Answer:

O f(x) = x(x – b) 3

Step-by-step explanation:

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3 0
2 years ago
The distribution of reading scale scores in the 4th grade at Truman Elementary School was approximately normal with mean = 221 a
liraira [26]

Answer:

221

Step-by-step explanation:

3 0
3 years ago
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