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2 years ago

I'll mark u as brainliest pls help with these 2 questions

Mathematics

2 answers:

son4ous [18]2 years ago

8 0

Answer:

1.) x=3

2.)x=10

Step-by-step explanation:

for the first problem you would add 1 to both sides, and you would get 5x=15, then you would divide both sides by by 5 to get x by itself. 5x/5=x and 15/5=3, so x=3. you can also plug it in. 5(3)-1=14

for the second one you wpuld subtract 15 from both sides, and you would get 3x=30. divide both sides by 3 which is x=10. plug it in, 15+3(10)=45.

aev [14]2 years ago

5 0

Answer:

3, 10

Step-by-step explanation:

5x-1=14 ->

5x=15 ->

x=3.

15+3x=45 ->

3x=45-15=30 ->

3x=30 ->

x=10.

Hope that help! :)

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I need help please, 20 points

valkas [14]

Answer:

the answer is 546 hope this helps :)

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Find S10 for -1 + -7 + -13 + -19

Alex777 [14]

First we find the common difference...to do this we subtract the first term from the second term. -7 - (-1) = -7 + 1 = -6

now we are going to find the 10th term
an = a1 + (n-1)*d <== formula for finding any term in arithmetic series
a1 = 1st term, d = common difference, n = term we want to find
now we sub
a10 = -1 + (10 -1) * -6
a10 = -1 + (9 * -6)
a10 = -1 - 54
a10 = - 55

now we will find the sum
Sn = (n (a1+ an)) / 2 <== formula for finding the sum
S10 = (10(-1 - 55))/2
S10 = (10(-56) / 2
S10 = -560/2
S10 = - 280

so the sum of the first 10 numbers is -280

4 0

3 years ago

What is the answer and how do you do the work

olga nikolaevna [1]

Answer: $\frac{3n - 8}{4n^{2} }$

Explanation:

First you need to factor out the GCF (greatest common factor) of the numbers, which is 8n.
$\frac{24n^{2} - 64 n}{32n^{3} } = \frac{8n(3n - 8)}{8n(4n^{2}) }$
The GCF cancels out on top and bottom so it becomes:
$\frac{3n - 8}{4n^{2}}$

6 0

3 years ago

There were 27 boxes of tea in the tea house. Each box weighed 18 kg. After selling 12 boxes, the shopkeeper packed the remaining

VladimirAG [237]

Answer:

30 boxes of tea

Step-by-step explanation:

27 (overall tea boxes) - 12 (boxes sold) = 15

15 (leftover boxes) x 18 (kg of each box) = 270

270 (overall kg of the boxes) divided by 9 (kg of the bags) = 30, so all the tea boxes can be placed into the bags

3 0

2 years ago

Circle O has a diameter of length 16. A point is located outside of the circle such that it lies 12 units from the circle's cent

olga2289 [7]

Answer:

Step-by-step explanation:

radius=16/2=8 units

d=12 cm

reqd. length=√(12²-8²)=√(144-64)=√80=4√5 units

7 0

2 years ago

I'll mark u as brainliest pls help with these 2 questions ​

I'll mark u as brainliest pls help with these 2 questions