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bezimeni [28]
3 years ago
11

Simplify the expression. 3y - 4.6 + 1.3 + 2.1y

Mathematics
2 answers:
ladessa [460]3 years ago
5 0

Answer:

5.1y-3.3

Explination: none

Rufina [12.5K]3 years ago
4 0

Answer:

5.1y-3.3

Step-by-step explanation:

I am sorry if its wrong

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The amount of radioactive element remaining, r, in a 100mg sample after d days is represented using the equation r=100(1/2) d/5.
Ludmilka [50]

Answer:

   12.94%

Step-by-step explanation:

r = 100(1/2)^(d/5) = 100((1/2)^(1/5))^d ≈ 100(.87055)^d

The daily decrease is 1 - 0.87055 = 0.12944 ≈ 12.94%

4 0
3 years ago
A livestock pen is built in the shape of a rectangle that is 2 times as long as it is wide. The perimeter is 30 feet. If the mat
shutvik [7]

Answer:

$57.5 is the total cost to build the pen.

Step-by-step explanation:

We are given the following in the question:

A livestock pen is built in the shape of a rectangle.

The length of rectangle is two times the width.

Let l be the length of rectangle and w be the width of rectangle. Thus, we can write

l = 2w

Perimeter = 30 feet

\text{Perimeter of rectangle} = 30\\2\times (l\times w) = 30

Putting values,

2(2w + w) = 30\\6w = 30\\w = 5\\l = 2w = 10

The length of rectangle is 10 feet and width of rectangle is 5 feet.

If the material used to build the pen is $ 1.75 per foot for the longer sides and $ 2.25 per foot for the shorter sides

Cost of building =

=2\times(\text{Cost of length}\times \text{Length} + \text{Cost of width}\times \text{Width})\\=2\times(1.75\times 10 + 2.25\times 5)\\=57.5

Thus, $57.5 is the total cost to build the pen.

7 0
3 years ago
Solve for x: 8x-5= 6x + 1
Romashka-Z-Leto [24]

Step-by-step explanation:

8x-5= 6x + 1

8x - 6x = 1+5

2x = 6

x= 2/6 = 1/3

x= 0.333

6 0
3 years ago
An electrician bought 120 feet of electrical wire and used 105 feet of it. What percent of the wire went unused? 15% 12. 5% 8. 7
Yuri [45]

Answer:

12.5%

Step-by-step explanation:

105 is what percent of 120?

you can use this proportion:

if/of = %/100

in this problem:

is = 105

of = 120

'what percent' = p/100

105/120 = p/100

cross-multiply to get:

120p = 10500

p = 10500/120

p = 87.5

So the electrician used 87.5%, out of 100%, meaning 12.5% went unused

5 0
2 years ago
Read 2 more answers
If 1+1=2 and 2 + 10 = 12 then what does W equal? Lol some easy math for y’all cuties 12 x W = 600
alisha [4.7K]
W=50 plus bakugou is mine so uraraka is waiting her time
8 0
3 years ago
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