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tankabanditka [31]
3 years ago
15

Simplify: (3+√5)(4-√5)

Mathematics
2 answers:
vovikov84 [41]3 years ago
6 0

Answer:

7+√5

Step-by-step explanation:

olganol [36]3 years ago
6 0

Answer:

7+\sqrt{5}

Step-by-step explanation:

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Use the substitution method to solve the system of equations 8x5y=9 y=x+7
Greeley [361]

Answer:

( − 7.00006693 , − 0.00006693 )    ( 0.68099975 , 7.68099975 )

Step-by-step explanation:

3 0
3 years ago
Please giving 20 points!!!
defon

Answer:

we choose f(x) = π cos(πx)

Step-by-step explanation:

Given the information:

  • f(0) = 0
  • f(2) = π

Let analyse all possible answers;

1/ f(x) = -2 sec(x)

when x= 0 we have: f(0) = -2 sec(0) = -2\frac{1}{cos(o)} = -2 wrong

2. f(x) = 7sin(x/4 - 1/29)

when x= 0 we have: f(0) =7sin(0/4 - 1/29) = 7sin(-1/29) = -0.00421 wrong

3. (x) = π cos(πx)

when x= 0 we have: f(0) = πcos(π0) = cos(0) = π0 = 0

when x= 2 we have: f(2) = πcos(π2) = πcos(0) = π

True

4. f(x) = 2π cos(x - π/2)

when x= 0 we have: f(0) = 2π cos(0 - π/2) = 2π cos(-π/2) = 0

when x= 2 we have: f(2) =2π cos(2 - π/2) = 2π0.034 = 0.0697π Wrong

So we choose f(x) = π cos(πx)

4 0
4 years ago
This data set represents the widths in yards of pieces of fabric used by a sewing group.
juin [17]

The mean of the data set in simplest form is: 4/5 yard.

<h3>What is the Mean of a Data Set?</h3>

Mean = sum of all values in the data set divided by the number of values in the data set.

Mean of the data set = (1 1/3 + 1/4 + 2/3 + 1/2 + 1 1/4)/5

Convert the mixed fractions to improper fractions

(4/3 + 1/4 + 2/3 + 1/2 + 5/4)/5

[(16 + 3 + 8 + 6 + 15)/12]/5

(48/12)/5

= 4/5

Therefore, the mean of the data set in simplest form is: 4/5 yard.

Learn more about mean of a data set on:

brainly.com/question/11015069

7 0
2 years ago
3x - 2y = 7. <br> Y = 3x / 2 - ?/?
elena-14-01-66 [18.8K]
  • Your dad and your mum that is the answer
7 0
3 years ago
Raj builds a side table in the shape of a cube. Each edge of the cube measures 30 inches. Raj wants to cover the top and four si
Vanyuwa [196]

Answer:

125

Step-by-step explanation:

Find the surface area of the table that Raj wants to cover.

Since the side table is a cube each side is identical.

Step 2:

Raj wants to cover 5 sides of the cube. Therefore the total surface area to be covered is 5 · 30 · 30 = 4,500 square inches.

Step 3:

Find the surface area of each tile.

The surface area of each tile is 6 · 6 = 36 square inches.

Step 4:

Find the number of tiles needed to cover the table.

4,500 square inches

36 square inches per tile

 = 125 tiles

Raj will need 125 tiles to cover the table.

7 0
3 years ago
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