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miv72 [106K]
3 years ago
6

I need help with 7th grade math please 45 points need help ASAP + brainleist

Mathematics
2 answers:
Vlada [557]3 years ago
8 0

Answer:

<u>77.98 ft</u>

Step-by-step explanation:

Perimeter :

  • 2(21) + 14 + 3.14 x 7
  • 42 + 14 + 21.98
  • 56 + 21.98
  • <u>77.98 ft</u>
igor_vitrenko [27]3 years ago
3 0

Answer:

Area = 601.8760801 ft^2

Step-by-step explanation:

Area of Rectangle: Area = Length* Height

Area of a Semi-Circle = π*r^2 /2

Area of Rectangle: Area = 14 * 21 = 294 ft^2

Area of a Semi-Circle = π * 14^2 / 2 = π * 196/2 = π * 98 ft^2

Add the Two Area: 294 ft^2 + 98π ft^2 = 601.8760801 ft^2

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You are making 5 Autumn Classic bouquets for your friends. You have $610 to spend and want 24 flowers for each bouquet. Roses co
BaLLatris [955]

There are 16 roses, 2 tulips, and 6 lilies in each Autumn Classic bouquet

Step-by-step explanation:

The information in the problem:

1. You have $610 to make five Autumn Classic bouquets for your friends

2. Each bouquet has 24 flowers

3. Roses cost $6 each, tulips cost $4 each, and lilies cost $3 each

4. You want to have twice as many roses as the other 2 flowers

    combined in each bouquet

We need to find how many roses, tulips, and lilies you include in each

Autumn Classic bouquet

Assume that the number of roses is R, the number of tulips is T and

the number of lilies is L in each bouquet

∵ There are R roses, T tulips and L lilies in each bouquet

∵ The number of flowers in each bouquet is 24

∵ R + T + L = 24 ⇒ (1)

∵ He has $610 to make the 5 bouquets

∴ He spends in each bouquet = 610 ÷ 5 = $122

∵ Each rose costs $6

∵ Each tulip costs $4

∵ Each Lillie costs $3

∴ 6R + 4T + 3L = 122 ⇒ (2)

∵ The number of roses is twice the sum of the numbers of the

   other 2 flowers

∴ R = 2(T + L)

∴ R = 2T + 2L ⇒ (3)

Substitute R in equations (1) and (2) by equation (3)

∵ (2T + 2L) + T + L = 24

- Add like terms in the left hand side

∴ 3T + 3L = 24 ⇒ (4)

∵ 6(2T + 2L) + 4T + 3L = 122

∴ 12T + 12L + 4T + 3L = 122

- Add like terms in the left hand side

∴ 16T + 15L = 122 ⇒ (5)

Let us solve the system of equations to find the values of T and L

Multiply equation (4) by -5 to eliminate L

∵ (-5)(3T) + (-5)(3L) = (-5)(24)

∴ -15T - 15L = -120 ⇒ (6)

Add equations (5) and (6)

∴ T = 2

- Substitute the value of T in equation (4) to find L

∵ 3(2) + 3L = 24

∴ 6 + 3L = 24

- Subtract 6 from both sides

∴ 3L = 18

- Divide both sides by 3

∴ L = 6

Substitute the values of T and L in equation (3) to find R

∵ R = 2T + 2L ⇒ (3)

∴ R = 2(2) + 2(6)

∴ R = 4 + 12

∴ R = 16

There are 16 roses, 2 tulips, and 6 lilies in each Autumn Classic bouquet

Learn more:

You can learn more about solving the system of equations in

brainly.com/question/13168205

brainly.com/question/9045597

#LearnwithBrainly

3 0
3 years ago
The perimeter of a square is 28 feet, what is the area
Nastasia [14]
Squares have equal sides, so 28 divided by 4 equals 7, and then base times height, which are both 7. So the area will be 7*7= 49. 
3 0
4 years ago
Read 2 more answers
If tan(tita) = 2 then find the values of other trigonometric ratios.​
Nady [450]
<h2>Answer:</h2>

<u>We know that</u>,

sec²θ = 1 + tan²θ

⇒ sec²θ = 1 + (2)²

⇒ sec²θ = 5

⇒ secθ = √5 …[1]

<u>Also</u>,

⇒ cosθ = 1/secθ

⇒ cosθ = 1/√5 …[2]

<u>Now, using</u>

tanθ = sinθ/cosθ

⇒2 = sinθ/1/√5

⇒2 = sinθ√5

⇒sinθ = 2/√5 …[3]

<u>Also</u>,

cosecθ = 1/sinθ

⇒cosecθ = √5/2 …[4]

cotθ = 1/tanθ

⇒cotθ = 1/2 ….[5]

7 0
3 years ago
Read 2 more answers
Help me please!!! Show work completely. I just need help with 9
Vlada [557]

Answer: x = -5, x = 6

<u>Step-by-step explanation:</u>

"Solutions" are also called roots, zeroes, and x-intercepts and are where the parabola crosses the x-axis.

The parabola crosses the x-axis at x = -5 and at x = 6

(see attachment)

6 0
3 years ago
The ________ of an event A is the collection of all outcomes in the sample space that are not in A.
IRISSAK [1]

Answer:

The complement of an event A is the collection of all outcomes in the sample space that are not in A.

Step-by-step explanation:

We have to fill the sentence in the given question:

Complement of an event:

  • Let A be an event, then complement of an event is defined as the the event with outcome not in A.
  • It is represented as A'
  • We can write P(A') = 1- P(A)
  • P(A) + P(A') = 1

Thus, we can fill the bank as

The complement of an event A is the collection of all outcomes in the sample space that are not in A.

8 0
3 years ago
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