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Romashka-Z-Leto [24]
3 years ago
13

PLEASE HELP!! BRAINILIESTTTT

Mathematics
1 answer:
Andrei [34K]3 years ago
5 0

Answer:

The element is Boron(B)

Step-by-step explanation:

This is because on the periodic table, it shows that Boron has 5 protons and 5 electrons

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Joel made egg sandwiches and tuna sandwiches in the ratio 2:3. He then made 15 more tuna sandwiches and the ratio changed to 1:3
Ksenya-84 [330]
So 2e:3t 3t+15=1e:3e so

2e:3t
3t+15
1e:3t
1e:3t=2e:6t
so 2e:6e
2e:3t+15=2e:6t
15=3t
t=5
2+3=5 units
5 times 5=25
he made 25 samiches in all
check
e:t=10:15=2:3
15+15=30
10:30=1:3
checks

he made 25 sammiches origonaly

8 0
3 years ago
Three students share 28 pencils equally.how many pencils does each person get?
Nonamiya [84]

Answer:

4

Step-by-step explanation:

28 divided by 7=4

3 0
3 years ago
If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g - 1)(3)?
storchak [24]
The answer will be 6(3)-4-32
8 0
3 years ago
4(x-5) +2 =x+3 <br><br> I need help on this ! I don’t get it picture above !
algol [13]

Answer:

x=-5

Step-by-step explanation:

4(x-5)+2=x+3 As the first step says, distribute the 4 (multiply all numbers in the parentheses by 4).

4x-20+2=x-3 Combine like terms. For example, the -20 and 2 are like terms because they are both their own numbers and not attached to a variable.

4x-18=x-3       Subtract x from each side. Now, we can get x to only one side.

<u>-x       -x</u>

3x-18=-3         Add 18 to both sides.

  <u>+18 +18</u>

3x=-15            Divide both sides by 3.

<u>/3   /3</u>

x=-5

I hope this helped you!! Have a great day c:

6 0
3 years ago
The mean of the temperatures in the chart is 24° with standard deviation of 4°. How many years had temperatures within one stand
lions [1.4K]

Answer:

Step-by-step explanation:

Given: The mean of the temperatures in the chart is 24° and standard deviation is 4°.

To find: How many years had temperatures within one standard deviation of the mean

Solution: Mean temperature μ = 24 , standard deviation σ =4

The lower and upper bound for temperature within one standard deviation of the mean is given as:

Lower bound = μ - σ = 24 - 4=20

Thus, the Lower bound is = 20

Upper bound = μ + σ = 24+ 4=28

Thus, the Upper bound is = 28

Now, The temperature value between (Lower bound, Upper bound) that is (20, 28) is said to be within one standard deviation of the mean.

Hence 27° is the temperature value that is within one standard deviation of mean.

5 0
3 years ago
Read 2 more answers
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