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Maru [420]
2 years ago
10

Who can help on this for brainliest ?

Mathematics
2 answers:
k0ka [10]2 years ago
8 0

Answer:

6

Step-by-step explanation:

1\frac{1}{2}÷\frac{1}{4}=

\frac{3}{2} *\frac{4}{1}=

6

Hope this helps!

Pls give brainliest

3241004551 [841]2 years ago
8 0

Answer:

3 or 6

Step-by-step explanation:

im pretty sure its 3 or 6

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Write an equation of a line in the form y=mx+b that together with the equation x+3y=9 forms a linear system that has no solution
Alex73 [517]

Answer:

I love algebra anyways

The ans is in the picture with the  steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

7 0
3 years ago
A marathon is 26.2 miles. What is the least number of times Miguel must run for his total distance run during training to exceed
ziro4ka [17]

Missing part of the question

Miguel has started training for a race. The first time he trains, he runs 0.5 mile. Each subsequent time he trains, he runs 0.2 mile farther than he did the previous time.

What is the arithmetic series that represents the total distance Miguel has run after he has trained n times?

Answer:

The least number of times Miguel must run for his total distance run during training to exceed the distance of a marathon is 17.3 miles

Step-by-step explanation:.

Given parameters

Miguel first run = 0.5 mile

Subsequent run = 0.2 mile

This question is an arithmetic progression.

We'll make use of arithmetic progression formula to solve this

Formula:.

Tn = a + (n - 1)d

Where a = first term

n = number of terms

d = common difference

In this case

a = first run = 0.5 mile

d = subsequent run = 0.2 mile

So, Tn = a + (n - 1)d become

Tn = 0.5 + (n - 1) 0.2

Tn = 0.5 + 0.2n - 0.2

Tn = 0.5 - 0.2 + 0.2n

Tn = 0.3 + 0.2n

The arithmetic series of an arithmetic progression is calculated using

Sn = ½(a + Tn) * n

By substituton, we have

Sn = ½(0.5 + 0.3 + 0.2n) * n

Sn = ½(0.8 + 0.2n) * n

Sn = 0.4n + 0.1n²

b.

Since the race is 26.2 miles then the least number of times is given as

Sn ≥ 26

0.4n + 0.1n² ≥ 26.2

0.1n² + 0.4n - 26.2 ≥ 0

Using quadratic formula

n = (-b ± √(b² - 4ac))/2a

Where b = 0.4 a = 0.1 and C = -26.2

So,

n = -0.4 ± √(0.4² - 4 * 0.1 * ,26.2)/2 * 0.1

n = (-0.4 ± √10.64)/0.2

n = (0.4 ± 3.26)/0.2

n = (0.4 + 3.26)/0.2 or (0.4 - 3.26)/0.2

n = 3.46/0.2 or -2.86/0.2

n = 17.3 or -14.3

Since n can't be negative

n = 17.3 miles

The least number of times Miguel must run for his total distance run during training to exceed the distance of a marathon is 17.3 miles

7 0
3 years ago
Read 2 more answers
Sam is saving for a guitar. He already has $50 saved and intends to save $30 each week. Sam found a guitar that costs $410. Afte
maxonik [38]

Answer:

12 weeks

Step-by-step explanation:

30 x 12 = 360

which equals 12 weeks in this case and 360 + 50 equals 410 the 50 came from the 50 he already had

I hope this helps!!

4 0
3 years ago
The scale on a map is 2 cm represents 1 km.
valina [46]

Answer:

4.5km

Step-by-step explanation:

2cm=1km

9cm=xkm

so to get from 2 to 9 all you do is multiply by 4.5 so do this the km and you will get 4.5km :)

5 0
3 years ago
Plz help got it wrong show work plz
igor_vitrenko [27]

Answer: C) $1951.53

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

A=P(1+r)^{t}

  • A is amount accrued (final balance)
  • P is the Principal (original amount deposited)
  • r is the rate (in decimal form)
  • t is the number of years

A=1500(1+0.068)⁴

  = 1500(1.068)⁴

  = 1951.53

6 0
3 years ago
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