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timurjin [86]
2 years ago
11

You bought 3 shirts for $12. How much would 5 shirts cost?

Mathematics
2 answers:
sdas [7]2 years ago
8 0

Answer:

20

Step-by-step explanation:

3/12=4

4x5=20

wooooow

andriy [413]2 years ago
5 0

Answer:

$20

Step-by-step explanation:

12/3 = 4

That means each shirt is 4 dollars.

5×4 = 20

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HELP^^ 7TH GRADE MATH
raketka [301]

Answer:

1 in : 50 ft

Step-by-step explanation:

Since the actual field is 300 feet long, in order to find the scale,

divide 300 by 6 to get 50,

Since we are thinking in inches to feet, 1 inch is equal to 50 feet.

Hope this helps

7 0
3 years ago
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Using the given points and line, determine the slope of the line.
jeka57 [31]

Answer:

7/5

Step-by-step explanation:

Slope formula = (y₂ - y₁) / (x₂ - x₁)

= (7 - 0) / (2 - (-3))

= 7 / (2 + 3)

= 7/5

7 0
3 years ago
Read 2 more answers
15 - 8 = 4 x 7 What operation would you do first in this expression? 4x7 15-8 8:4​
Afina-wow [57]

Answer:

Multiply first. PEMDAS - Parenthesis, Exponents, Multiplication, Divison, Addition, Subtraction.

Step-by-step explanation:

15 - 8 = 4 x 7

6 = 36

8 0
3 years ago
2.30
Paha777 [63]
The error is if you add all of those times up it is equal to 7.55 minutes and that's more than 6
5 0
3 years ago
A geometric progression has a third term of 20 and a sum of infinity which is 3 times the first term. Find the first term ​
Anna007 [38]

Answer: the first term is 45

Step-by-step explanation:

Step 1: The formular for the nth term is ar^n-1 and since we're solving for the third term ar^3-1 = ar² which is equal to 20

So ar²= 20 and we make this equation i

Step 2: the formular for the sum of infinity is Sn = a/(1-r) and according the question the sum of infinity is equals to 3 *A ( A means the first term)

Further simplification gives us

3a= a/(1-r)

We simplify Futher by multiplying both sides by (1-r)

3a.(1-r) = a/(1-r).(1-r)

3a(1-r)=a

= 3a-3ar=a

Make 3ar the subject of the formula

3ar= 2a and lets make this equation (ii)

Step 3: From the first equation since ar²=20, let's make a the subject of the formula by dividing both sides by r²

Ar²/r² = 20/r²

A=20/r²lets make this equation (iii)

Step 4: subtitle a as 20/r² into equation (ii)

Since 3ar=2a

Then 3.(20/r²).r = 2. 20/r²

= (60/r²) .r = 40/r²

60/r = 40/r2

Multiplying both sides by r² gives us

60r = 40

Divide both sides by 20 gives us

= 3r= 2

Divide both sides by 3 gives us

= r = 2/3

Step 5: substitute r for 2/3 in equation i

ar²= 20

a. (2/3)2 = 20

= a.4/9 = 20

= 4a = 180

= a = 180/4

a = 45

5 0
3 years ago
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