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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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Evaluate each expression for the given value of the variables. 2x + y for x= 7 and y = 11​
prisoha [69]

Answer:

25

Step-by-step explanation:

Substitute 7 into 2, and 11 into y.

2(7)+(11)

14+11

25

4 0
2 years ago
9. A store is offering a 20% discount on all sales over $50. If you purchase a shirt and a pair of jeans for $62.50, what
Serga [27]

Answer:

B. 12.50.

Step-by-step explanation:

62.50 x .20 = 12.5

Hope this helps and good luck.

3 0
3 years ago
Read 2 more answers
One endpoint of a line segment has coordinates represented by (x+4,1/2y). The midpoint of the line segment is (3,−2).
lesya692 [45]

Answer:

(-x+2, -\frac{1}{2}y-4})

Step-by-step explanation:

We know that one of the endpoints of the line segment is (x+4, 1/2y)

The midpoint of the line segment is (3, -2).

And we want to find the other coordinates in terms of x and y.

To do so, we can use the midpoint formula:

M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

Since we know that the midpoint is (3, -2), let's substitute that for M:

(3, -2)=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

Let's solve for each coordinate individually:

X-Coordinate:

We have:

3=\frac{x_1+x_2}{2}

We know that one of the endpoints is (x+4, 1/2y). So, let's let (x+4, 1/2y) be our (x₁, y₁). Substitute x+4 for x₁. This yields:

3=\frac{(x+4)+x_2}{2}

Solve for our second x-coordinate x₂. Multiply both sides by 2:

6=x+4+x_2

Subtract 4 from both sides:

2=x+x_2

Subtract x from both sides. Therefore, the x-coordinate of our second point is:

x_2=-x+2

Y-Coordinate:

We have:

-2=\frac{y_1+y_2}{2}

Substitute 1/2y for y₁. This yields:

-2=\frac{\frac{1}{2}y+y_2}{2}

Solve for y₂. Multiply both sides by 2:

-4=\frac{1}{2}y+y_2

Subtract 1/2y from both sides. So:

y_2=-\frac{1}{2}y-4

Therefore, the other coordinate expressed in terms of x and y is:

(-x+2, -\frac{1}{2}y-4})

3 0
2 years ago
Point N(7, 4) is translated 5 units up. What are the coordinates of its image after this transformation?
GrogVix [38]

You are translating upwards, so you add 5 to the y

N(7, 4 (+5))

Simplify

N'(7,9) is your new coordinate

hope this helps

8 0
3 years ago
I need help solving this step by step. Work would be nice so I can look and understand it so I can try a different problem. ​
zimovet [89]

Answer:

I need points, sorry, i cant help

Step-by-step explanation:

3 0
3 years ago
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