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3 years ago

Hello! Please help!!!

Mathematics

2 answers:

Damm [24]3 years ago

8 0

Answer:

Step-by-step explanation:

grigory [225]3 years ago

6 0

Answer:

It should be 1.5

Step-by-step explanation:

I hope that helps

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Determine if KLMN must be a parallelogram. Justify your answer.

Ludmilka [50]

Answer:

(D)

Step-by-step explanation:

For there too be a parallelogram, you must have two pairs of opposite side parallel lines. This means that KN & LN must be parallel, and KL & NM have to be parallel.

7 0

3 years ago

Read 2 more answers

Solve the simultaneous equations: <br> 5x + 2y = 17<br> 4x + y = 10

erik [133]

Answer:

(1, 6 )

Step-by-step explanation:

5x + 2y = 17 → (1)

4x + y = 10 → (2)

Multiplying (2) by - 2 and adding to (1) will eliminate the y- term

- 8x - 2y = - 20 → (3)

Add (1) and (3) term by term to eliminate y

- 3x + 0 = - 3

- 3x = - 3 ( divide both sides by - 3 )

x = 1

Substitute x = 1 into either of the 2 equations and solve for x

Substituting into (1)

5(1) + 2y = 17

5 + 2y = 17 ( subtract 5 from both sides )

2y = 12 ( divide both sides by 2 )

y = 6

solution is (1, 6 )

8 0

2 years ago

A sample of 1500 computer chips revealed that 55% of the chips do not fail in the first 1000 hours of their use. The company's p

Anvisha [2.4K]

Answer:

1.28

Step-by-step explanation:

Given that a sample of 1500 computer chips revealed that 55% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 53% of the chips do not fail in the first 1000 hours of their use.

$H_0: p = 0.53\\\\H_a: p \neq 0.53$

(Two tailed test for testing sample proportion with population proportion)

Std error of proportion assuming p = 0.53 is

$\sqrt{0.53*0.47/1000} \\=0.0157$

p difference = 0.02

Z= test statistic = p diff/std error = 1.2775~1.28

8 0

3 years ago

What is the length of segment RT?

navik [9.2K]

When two chords of a circle intercept, the products of the segments are equal, that is, PT*QT=RT*ST
6*4=RT*10
RT=2.4

5 0

3 years ago

They sell cakes for $4 each and spent $45 for advertisement if each cake costs 80 cents to make, how many cakes do they need to

Damm [24]

Answer:

They need to sell 14 cakes to break even.

Step-by-step explanation:

The selling price of each cake = $ 4

The amount spent on the advertisement = $45

The cost of each cake = 80 cents =$ 0.8

Let us assume the number of cakes sold to BREAK EVEN = m

⇒ For m cakes: TOTAL COST = TOTAL EARNED

Now, if the cost of 1 cake = $0.8

So, the cost of making m cakes = m X ( cost of 1 cake) = m x ( 0.8) = 0.8 m

Total Cost of m cakes = Making cost + Advertisement cost

= 0.8 m + $45

⇒C = 0.8 m + 45 ........... (1)

Here, the selling price of 1 cake = $4

So, the cost of selling m cakes = m X ( Sell cost of 1 cake)

= m x ( 4) = 4 m

⇒S = 4 m ........... (2)

To break even: S = C ⇒0.8 m + 45 = 4 m

or, 45 = 3.2 m

or, m = 45/3.2 = 14.06≈ 14

⇒ m = 14

Hence, they need to sell 14 cakes to break even.

6 0

3 years ago