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Alex73 [517]
3 years ago
11

If x2 - 4 = 45, then x could be equal to 9 3 5 -7 -4

Mathematics
2 answers:
sweet [91]3 years ago
6 0
Hi:))

x² - 4 = 45

X² = 45 + 4

X² = 49

√x² = √49

x = 7
BlackZzzverrR [31]3 years ago
4 0
x^{2}  - 4 = 45

x^{2} = 45 + 4

x^{2} = 49

\sqrt{ x^{2} } =  \sqrt{49}

x = 7
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The length of a rectangular piece of sheet metal is 3 times it’s width. What is its length if it’s area is 192 square centimeter
weqwewe [10]

To find the missing number, you will need to divide the numbers you already have.

192 divided by 3 = 64

Your answer/length will be 64.

Area = 192

Width = 3

Length = 64

64 x 3 = 192

                                                                                Hope this helps :)

5 0
3 years ago
Rachel is getting a sundae where the cost is proportional to the weight of the sundae she makes. last time rachel went she bough
Ivan

Using proportions, the cost of the 17-ounce sundae is of $5.95.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.

Considering the 12-ounce sundae bought for $4.2, the cost per ounce is given by the following proportion:

$4.2/12 = $0.35.

Hence the cost of a 17-ounce sundae is:

$0.35 x 17 = $5.95.

More can be learned about proportions at brainly.com/question/24372153

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6 0
2 years ago
Consider a room that is 20 ft long, 15 ft wide, and 8 ft high. For standard sea level conditions, calculate the mass of air in t
irga5000 [103]

Answer:

5.70456 slug

Step-by-step explanation:

Data provided in the question:

Dimensions of the room = 20 ft long, 15 ft wide, and 8 ft high

Now,

Volume of the room = 20 × 15 × 8

or

Volume of the room = 2400 ft³

we know,          

Density of air = 0.0023769 slug/ft³

Therefore,

Mass of air in the room = Volume × Density

= 0.0023769 × 2400

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3 0
3 years ago
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Bas_tet [7]

Answer:

base = 5.6 cm

Step-by-step explanation:

area of a triangle = 1/2 * base * height

area = 5.88 cm²

height = 2.1 cm

5.88 = 1/2 * base * 2.1

5.88 = 1.05 base

5.88 / 1.05 = base

base = 5.6 cm

4 0
3 years ago
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djyliett [7]

Answer: 3.3

x.   = 1.5

220      100

5 0
3 years ago
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