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stellarik [79]
3 years ago
7

What is equivalent to 3(y+4)+4(y-2)

Mathematics
1 answer:
amid [387]3 years ago
7 0

Answer:

7y+4

Step-by-step explanation:

combine liked terms

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Que numero multiplicado por -8 da como resultado 72
Bumek [7]

Answer:

2×72 = 144

Step-by-step explanation:

¡Aquí puedes aprender todo sobre las multiplicaciones! HAGA CLIC PARA TWITTEAREntonces, la multiplicación 2 x 72 es una suma abreviada.

3 0
3 years ago
30% of 60 is <br><br> 30%of ____ is 60
ololo11 [35]
You know that 3 times 2 is 6 so 30'times 20 equals 60
6 0
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I miss 3 out of 10 questions on a health quiz. What is the percentage of correct answers???
Vladimir79 [104]
So 10 questions is 100% you missed 30% of the questions so you would do 100%-30% which is 70%
8 0
3 years ago
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Geometry math question no Guessing and Please show work thank you
Lelu [443]

DE + EF = 4x+2

DE = x+7

EF = 7

Substitute these in

x + 7 + 7 = 4x + 2

x + 14 = 4x + 2

subtract x from both sides

14 = 3x + 2

subtract 2 from both sides

3x = 12

divide both sides by 3

x = 4

substitute this in to find the length of DE

DE = x + 7

(4) + 7 = 11

the answer is 11

5 0
3 years ago
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A ship is moving at a speed of 30 km/h parallel to a straightshoreline. The ship is 6 km from the shore and it passes alighthous
natita [175]

Answer:

A)  S = f(d) = √(36 + d²)

B)  d = g(t) = 30t

C)  f o g = √(36 + 900t²)

Explanation:  

A) Express the distance s between the lighthouse and the ship as a function of d, the distance the ship has traveled since noon;that is, find f so that s = f(d)

Refer to the attached image and observe that ship starts moving from point I towards point N which represents the position of ship at noon.

From point I to point N ship covers the distance d.

From point I to point L (lighthouse) the distance is S.

A triangle is formed and we want the distance S so we will apply the Pythagorean theorem

IL² = NL² + IN²

S² = 6² + d²

S = √(36 + d²)

Therefore, the function is S = f(d) = √(36 + d²)

B) Express d as a function of t, the time elapsed since noon;that is, find g, so that d = g(t)

Since the ship is moving at a speed of 30 km/h and let t represents the time taken to move from I to N then

d = 30t

or

d = g(t) = 30t

C) Find f o g. What does this function represent?

Since we have already found f(d) and g(t) we can find f o g.

f(d) = √(36 + d²) and d = g(t) = 30t

substitute d = g(t) = 30t into f(d)

f o g = √(36 + (g(t))²)

f o g = √(36 + (30t)²)

f o g = √(36 + 900t²)

This function simply represents the distance from point I to point N to point L which is the longer distance from the initial position of ship to the lighthouse.

7 0
3 years ago
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