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erastova [34]
3 years ago
6

Jonny can build 3 1/2 lego planes in 60 minutes. How many can he build in 40 minutes

Mathematics
1 answer:
NeX [460]3 years ago
8 0

Answer:

2.3lego

Step-by-step explanation:

We can walk through this problem using the cross multiplication method

First 3 1/2 lego is same as 3.5lego

Hence If

Johnny builds 3.5lego in 60min

He can build xlego in 40min

Crosss multiplying we have

Xlego *60= 3.5*40

Xlego= 140/60= 2.3lego

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Match each expression to its exponential form.
jonny [76]

10^2 = 10 × 10

10^3 = 10 × 10 × 10 = 1000

10^4 = 10 × 10 × 10 × 10

7 0
3 years ago
Will mark brainliest and rate 5/5 if question is answered right.
Roman55 [17]

Answer:

a) A = 36π in² ≈ 113.09 in²

b)  $0.98 per slice

c) $0.09 per square inch

Step-by-step explanation:

a) area = πr²

    r= diameter/2 = 12/2 = 6

    A = π(6)²

    A = 36π in² ≈ 113.09 in²

b) s = price per slice

   s = 9.75 ÷ 10

   s = $0.975 ≈ $0.98

c) price per square inch = price ÷ area

   = 9.75 ÷ 113.09

   = $0.086 ≈ $0.09 per square inch

4 0
3 years ago
How does the value of the digit 2 in 2000 compare with the value of the digit 2 in 200
iragen [17]

Answer:

The value of 2 in 2000 is 10 times greater than the value of 2 in 200

Step-by-step explanation:

from the value of 2 in 200 to reach 2000, it takes 10 times as much because we're moving only one place (which is the thousand's digit).

6 0
3 years ago
Finding Derivatives Implicity In Exercise, find dy/dx implicity.<br> ln xy + 5x = 30
Sphinxa [80]

Answer:

dy/dx = -5y - y/x

Step-by-step explanation:

In xy + 5x = 30

Differentiating xy implicitly

y + xdy/dx

Assuming u = xy

In xy = In u

Differentiating In u = 1/u = 1/xy

Differentiating 5x = 5 and differentiating a constant (30) = 0

1/xy(y + xdy/dx) + 5 = 0

(y + xdy/dx)/xy = -5

(y + xdy/dx) = -5xy

xdy/dx = -5xy - y

dy/dx = = (-5xy - y)/x

dy/dx = -5y - y/x

7 0
3 years ago
A field trip is planned which is 10 2/9 miles from school. A wheel of the school bus is punctured after 5 3/7. How many miles ar
lisabon 2012 [21]
4 50/63 is the answer

6 0
3 years ago
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