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Anna11 [10]
3 years ago
15

Combining like terms with n

Mathematics
2 answers:
NemiM [27]3 years ago
6 0

Answer:

2k

Step-by-step explanation:

-1k + 3k = k(3-1) = 2k

Serga [27]3 years ago
4 0

Answer:

-2k

Step-by-step explanation:

-k +3k

Factor out k

k(1-3)

k (-2)

-2k

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In my fish tank, the ratio of red fish to blue fish is 1:5. There are 15 blue fish. How many red fish are there?
ElenaW [278]

Answer:

there are 3 red fish

Step-by-step explanation:

1:5

_:15

5 times 3 =15

so 1 times 3 =3

4 0
4 years ago
Read 2 more answers
How many different ways can a kite be reflected across a line of symmetry so that it carries onto itself?
Semenov [28]

Answer: correct choice is B.

Rectangle has two axes of symmetry So an arbitrary rectangle can be reflected across two axis of symmetry so that it carries onto itself.

3 0
3 years ago
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An aircraft seam requires 24 rivets. The seam will have to be reworked if any of these rivets are defective. Suppose rivets are
kirill [66]

Answer:

Step-by-step explanation:

a)

p(d) - probability of a rivet being defective

p(r) - probability of seam needing to be reworked

The probability of the seem needing to be reworked is equal to the probability that ANY of 24 rivets is defective

Thus the probability that none of the 25 rivets is defective is 1-p(r)

p(r) = 16%, thus 1-p(r) = 84%

1-p(r) = (1-p(d))^24

0.84 = (1-p(d))^24

0.84^(1/24) = 1-p(d)

==> 1-p(d) = 0.9927615998

==> p(d) = 1-0.9927

==> p(d) = 0.0073

b) given p(r) = 8%, thus 1-p(r) = 92%

1-p(r) = (1-p(d))^24

0.92 = (1-p(d))^24

0.92^(1/24) = 1-p(d)

==> 1-p(d) = 0.99653179446

==> p(d) = 1-0.9965

==> p(d) = 0.0035

5 0
3 years ago
Match each equation with the correct solution .
mafiozo [28]
Download math-way that’s a good app it will help you with all your math/algebra problems I’m doing a exam so I don’t have time to put all the equations to find the answers sorry :(
3 0
3 years ago
The sum of a number and twice another number is 17. The sum of twice the first number and the second number is 4. What are the t
zhannawk [14.2K]

Step-by-step explanation:

Given that,

a + 2b = 17

Also,

2a + b = 4

By adding the above expressions we get,

a + 2b + 2a + b = 17 + 4

3a + 3b = 21.

3 (a + b) = 21

a + b = 21/3

a + b = 7 Let us take 'b' = 10

a + 10 = 7

a = 7 - 10

a = -3

Now let's check by verifying by putting a = -3 and b = 10 in the previous expressions

a + 2b = 17

-3 + (2 × 10) = 17

-3 + 20 = 17

17 = 17

2a + b = 4

(2 × -3) + 10 = 4

-6 + 10 = 4

4 = 4

Therefore, a = -3 and b = 10 [(-3,10)] is the solution.

8 0
3 years ago
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