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Scilla [17]
3 years ago
9

If Samantha has 30 marbles and gave 2 away, how much will she have left?

Mathematics
2 answers:
Tatiana [17]3 years ago
7 0

30-2=28. Samantha has 28 marbles left.

gtnhenbr [62]3 years ago
6 0

Samantha will have 28 marbles left.

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The areas of two similar triangles are 72dm2 and 50dm2. The sum of their perimeters is 226dm. What is the perimeter of each of t
zloy xaker [14]

Answer:

103=  p small

plarge = 123

Step-by-step explanation:

We know that the the ratio of the areas is the scale factor squared/

Larger triangle over smaller triangle

72

----- = scale factor ^2

50

simplify by dividing by 2 on top and bottom

36

----- = scale factor ^2

25

Take the square root of each side

sqrt(36)

-------------- = sqrt(scale factor ^2)

sqrt(25)

6

-------------- = scale factor

5

The ratio of the perimeters is the scale factor

p large             6

-------------- = ----------------

 p small                5

Using cross products

6 p large = 5 p small

We know the sum is 226

p large + p small = 226

p large = 226 - p small

We have 2 equation and 2 unknowns

6 p large = 5 p small

Substitute for p large

6 (226 - p small) = 5 p small

1356 - 6 p small = 5 p small

Add 6 p small to each side

1356 = 11 p small

divide by 11

1356/11 =  p small

P large = 226-1356/11

p large = 2486/11-1356/11

plarge = 1130/11

The solution requires whole number answers so

1356/11 =  p small

123.27 which rounds to 123

plarge = 1130/11

plarge = 102.7272 = 103

6 0
3 years ago
Thomas earns 15 mowing lawns over 3 days. How much money would he earn in 4 days if he earned the same amount every day
gladu [14]

Answer: 20 Dollars

Step-by-step explanation:

15 divided by 3 is 5. So, then multiply 4x5 and that equals 20

7 0
3 years ago
Read 2 more answers
Janet borrowed 2000 for three years at a 5% interest rate compounded annually
Natasha_Volkova [10]
A=p (1+r)^t
A=2,000×(1+0.05)^(3)
A=2,315.25
4 0
2 years ago
PLZ HELP
ikadub [295]
I pick cancer and the growth rate is 6% per day then 2 weeks by (14 days) the growth of cancer is now 84% (6x14) 

the table is two weeks later 
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3 0
3 years ago
Read 2 more answers
BRAINLIESTT ASAP! PLEASE HELP ME :)
sukhopar [10]

Answer: A) none of the equations are identities

==========================================

Part 1

Plug in theta = 0

sin(theta+pi/2) - cos(theta+pi/6) = 2*cos(theta) - sin(theta)

sin(0+pi/2) - cos(0+pi/6) = 2*cos(0) - sin(0)

1 - sqrt(3)/2 = 2*1 - 0

0.13 = 2

which is a false equation

So we do not have an identity in equation 1.

-------------------------------------------

Part 2

Plug in theta = 0

sin(theta+pi/6) + cos(theta+pi/3) = (sqrt(2)/3)*sin(theta) + 2*cos(theta)

sin(0+pi/6) + cos(0+pi/3) = (sqrt(2)/3)*sin(0) + 2*cos(0)

1/2 + 1/2 = 0 + 2

1 = 2

which is also false

This is not an identity either.

6 0
2 years ago
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