In ΔCDE, the measure of ∠E=90°, the measure of ∠C=78°, and DE = 2.2 feet. Find the length of EC to the nearest tenth of a foot.

Answer:

what is the question?

Step-by-step explanation:

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Answer:

[tex]v = \frac{1}{3} \times h \times r {}^{2} \times \pi[/tex]

[tex]v = \frac{12cm \times (8cm) { }^{2} \times \pi}{3} [/tex]

[tex]v = \frac{768cm {}^{3}\pi }{3} [/tex]

[tex]v = 256\pi \: cm {}^{3} [/tex]

9514 1404 393

Answer:

  (a) A : B = $9000 : $6000

  (b) $1260

  (c) A : S : J = $1050 : $2250 : $1200 = 7 : 15 : 8

Step-by-step explanation:

(a) The investment ratio is ...

  Angela : Barbara = 24000 : 16000 = 3 : 2

The profit of 15,000 goes 3/(3+2) = 3/5 to Angela, and 2/5 to Barbara:

  Angela's share: (3/5)($15,000) = $9,000

  Barbara's share: (2/5)($15,000) = $6,000

__

(b) We can multiply the ratio by $140 to see the larger amount:

  4 : 9 = ($140)(4) : ($140)(9) = $560 : $1260

The larger share is $1260.

__

(c) Sian gets (1/2)($4500) = $2250. Anesha gets $1050. So  Joanne gets ...

  $2250 -1050 = $1200

Then the shares are ...

  i. Sian: $2250

  ii. Joanne: $1200

  iii. Ratios: A : S : J = 105 : 225 : 120 = 7 : 15 : 8

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Explanation:

The inequality 6x - 10y ≥ 9 solves to y ≤ (3/5)x - 9/10 when you isolate y.

Graph the line y = (3/5)x - 9/10 and make this a solid line. The boundary line is solid due to the "or equal to" as part of the inequality sign. We shade below the boundary line because of the "less than" after we isolated for y.

Now graph all of the points given as I've done so in the diagram below. The points in the blue shaded region, or on the boundary line, are part of the solution set. Those points are D, E and F.

We can verify this algebraically. For instance, if we weren't sure point E was  a solution or not, we would plug the coordinates into the inequality to get...

6x - 10y ≥ 9

6(5) - 10(2) ≥ 9 .... plug in (x,y) = (5,2)

30 - 20 ≥ 9

10 ≥ 9 ... this is a true statement

Since we end up with a true statement, this verifies point E is one of the solutions. I'll let you check points D and F.

-----------

I'll show an example of something that doesn't work. Let's pick on point A.

We'll plug in (x,y) = (-1,1)

6x - 10y ≥ 9

6(-1) - 10(1) ≥ 9

-6 - 10 ≥ 9

-16 ≥ 9

The last inequality is false because -16 is smaller than 9. So this shows point A is not a solution. Choices B and C are non-solutions for similar reasons.

Answer:

$56

Step-by-step explanation:

Find out the percentage of the pair of shoes after the sale discount.

100 - 25 = 75%

75% = 42

1% = 42 ÷ 75 = 0.56

100% is the percentage of the original price.

100% = 0.56 x 100 = 56

Answer:

Lyndsay charges a better deal

Step-by-step explanation:

With Lyndsay charging $100 for 4 hours you get $20 off because 4 hours with Margaret charges $120.

Answer:

Margaret

Step-by-step explanation: Lyndsay charges 25 dollars an hour for tutoring while Margaret only charges 20 dollars an hour for tutoring. Therefore, Margaret has a WAY better deal, Lyndsay charges 5 more dollars then Margaret.

60 divided by 2: 20

100 divided b 4: 25.

              {~} Izzy ∩﹏∩ {~}

Answer:it should be 8

Step-by-step explanation:

Step-by-step explanation:

P(A) = . 6

P(B) = . 3

P(A or B)

= P(A) + P(B)

= . 6 + .3

= . 9

Hope it will help :)❤❤

Answer: y- 1 = -5/4(x+4)\\

Step-by-step explanation:

y = mx + b, where m is the slope, and in the equation, the slope is -5/4.

For two-line that are parallel, the slope is the same, -5/4.

[tex]y - y_{1}= m( x - x_{1})\\y- 1 = -5/4(x-(-4))\\y- 1 = -5/4(x+4)\\[/tex]

Answer:

72 1/3

Step-by-step explanation:

This is the answer:

Mass of earth: 5.97200e21 or 5.97200000000000000000000000

Mass of planes: 210000

Now, we have to divide the mass of the earth into the amount of planes.

For example,  Earth/Planes.

And the answer is: 2.84380952e5. Or 2.8438095200000. I hope this helps!

Answer:

(No rounding done.)

1. 10

2. 14.1421

3. 8

4. 6.9282

Step-by-step explanation:

To find 1, you need to use tangent. Let's say the missing side is x. You need to use tan(45) = x/10 to be able to solve. If you don't know how to do that, you just need to multiply by 10 on both sides, that way the 10 cancels out and all you get is x. Tan(45) multiplied by 10 is 10.

Now, find 2 with sine. The equation is sin(45) = 10/x. First, you need to multiply both sides by x so you get 10 alone. Now, divide both sides by sin(45) to cancel out the left side and get the answer to 2. 10/sin(45) = 14.1421 (I don't know if you need to round).

To find 3, you need to use cosine. The equation would be cos(60) = 4/x. Again, multiply both sides by x to get 4 alone. Next, divide both sides by cos(60). 4/cos(60) is 8.

To find 4, you need to use sine again. The equation is sin(60) = x/8. Multiply both sides by 8, and there's your answer. 6.9282.

Answer:

5X²+7X-9-4X²-X+18

5X²-4X²+7X-X+18-9

X²+6X+9 =0

X²+(3X+3X)+(3×3)=0

ALL FACTORS ARE =3,3   that is  pdt of factor 3×3 =9   sum =3+3 =6

(X+3) ( X+3) =0  

X+3 =0

X=-3

ANS = X=-3

Step-by-step explanation:

Answer:

It is the last one

Step-by-step explanation:

Answer:

Option 1

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

0.08= 8/10. so it would be simple multiplication using fractions. 2/3x8/10 giving us 16/30= 8/15. sorry got wrong answer at first.

Answer:

1

Step-by-step explanation:

3(x + 3) = 12

Multiply 3 by both numbers in the parentheses.

3x + 9 = 12

Subtract 9 from both sides of the equation.

3x = 3

Divide 3 from both sides of the equation.

x = 1

Answer:

You did not ask a question, but if you need Math help in the future try using the apps I named in the screenshot since Brainly does not allow me to write it.

Step-by-step explanation:

Answer:

2 1/2 cups = 1.25 or 1 and 1 quarter liquid pint (U.S)

Step-by-step explanation:

Answer:

1204

Step-by-step explanation:

Answer:

...

Step-by-step explanation:ok first off im not good at math try ur best

everybodys smartVwV

La respuesta correcta es .15

Answer:

3200

Step-by-step explanation:

12 percent of 3200 is 384

Answer:

$3,200 the employee earns in total.

Step-by-step explanation:

Given:

Discount = 40%

Sales tax = 7%

To find:

The total cost of levi jeans with an original price of x.

Solution:

Let x be the original price of the jeans. Then the price after 40% discount is

[tex]Price=x-40\%\text{ of }x[/tex]

[tex]Price=x-\dfrac{40}{100}x[/tex]

[tex]Price=x-0.4x[/tex]

[tex]Price=0.6x[/tex]

The price after 7% of sales tax.

[tex]Price=0.6x+7\%\text{ of }0.6x[/tex]

[tex]Price=0.6x+\dfrac{7}{100}\times 0.6x[/tex]

[tex]Price=0.6x+0.042x[/tex]

[tex]Price=0.642x[/tex]

Therefore, the total cost  of the levi jeans with an original price of x is represented by the expression 0.642x.

Answer:

I think 14

Step-by-step explanation:

I think 14 because I added on paper and got 14

Answer:

Step-by-step explanation:

x = -4.5