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lions [1.4K]
3 years ago
15

Can someone help me here.

Mathematics
2 answers:
Oxana [17]3 years ago
6 0
I’m pretty sure it’s A
stealth61 [152]3 years ago
5 0

Answer:

A

Step-by-step explanation:

y = mx + b

    m = slope

    b = y-intercept

3x - 2y = 12

-2y = -3x + 12

2y = 3x - 12

y = 3/2x - 6

Slope is 3/2

Y-intercept is -6

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The areas of two similar triangles are 72dm^2 and 50dm^2. The sum of their perimeters is 226dm. What is the perimeter of each of
Kruka [31]

Answer:

Per2 = 102.727 dm

Per1 = 123.272 dm

Step-by-step explanation:

We know that the area of similar triangles are related to the square of their perimeters.

This means that

(Per1^2)/(Per2^2)  =  Area1 / Area2

If we take the square root of the previous equation

(Per1)/(Per2)  =  \sqrt{Area1 / Area2}

(Per1)/(Per2)  =  \sqrt{72/ 50}

(Per1)/(Per2) = 1.2

We also know that

Per1 + Per2 = 226 dm

So,

1.2*Per2 + Per2 = 226 dm

2.2*Per2 = 226 dm

Per2 = 102.727 dm

Per1 = 1.2*Per2 = 123.272 dm

6 0
3 years ago
What is 4/5 + 3/4 I need it for my homework
Vladimir79 [104]

Answer:

4/5 + 3/4 = 1\frac{11}{20} or 1.55

Step-by-step explanation:

This can be solved by first finding the highest common factors of denominators of the two fractions, i.e. 4 and 5.

The highest common factor of 4 and 5 can be found by multiplying the two numbers as follows:

The highest common factor of 4 and 5 = 4 * 5 = 20

This can now be used to solve  4/5 + 3/4 as follows:

4/5 + 3/4 = ((4 * 4) + (5 * 3)) / 20 = (16 + 15) / 20 = 31 / 20 = 1\frac{11}{20} or 1.55

Therefore, we have:

4/5 + 3/4 = 1\frac{11}{20} or 1.55

3 0
3 years ago
7) Katie is baking muffins for a picnic. She can bake 24 muffins in 45 minutes. At this rate, how
Sati [7]
She can bake 48 muffins in 90 minutes. Since she can bake 24 in 45 min, 90 min is double that, so double the original amount of cupcakes. 24x2=48
4 0
2 years ago
No need to show/explain just need the answer lol
bulgar [2K]

Answer:

a. -44

b. 32

Step-by-step explanation:

i need more characters so imma show work

((4-10+3(2-3))+2)6-2

((-9)+2)6-2

-42-2

-44

(9+3(2)) + ((6+2(-2))+7)

(9+6)+((10)+7)

15+17

32

8 0
3 years ago
Read 2 more answers
You can ride your bike around your block 10 times and the whole neighborhood once in 24 minutes. You can ride you bike around yo
Anna35 [415]

4 minutes

Set up 2 equations and solve

let b represent time taken to ride around block and

let n represent time taken to ride around neighbourhood, then

10b + n = 24 → (1)

5b + 2n = 18 → (2)

multiply (1) by - 2

- 20b - 2n = - 48 → (3)

add (2) and (3) term by term to eliminate n

- 15b = - 30 ( divide both sides by - 15 )

b = 2

substitute b = 2 into (1) and solve for n

20 + n = 24 ( subtract 20 from both sides )

n = 4

Thus it takes 4 minutes to ride around the neighbourhood


4 0
2 years ago
Read 2 more answers
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