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sesenic [268]
2 years ago
6

Please help me! I would appreciate it! :)

Mathematics
2 answers:
krek1111 [17]2 years ago
4 0

Answer:

See below.

Step-by-step explanation:

4(18-3k)=9(k+1)

72-12k=9k+9

    +12k +12k

72=21k+9

-9         -9

63=21k

/21  /21

3=k

-hope it helps

Ksju [112]2 years ago
4 0

Answer: k= 83/21

Step-by-step explanation:

Distribute the 4 to each number/constant in the parentheses:

First multiply 4 and 18 to get 72

Then 4 and -3k to get -12 k

this gives you 72 - 12k

Same for the other side:

9(k)+9(1)= 9k+9

now that you set them them up next to eachother, 72-12k = 9k+9, combine like terms and get the numbers with the variable k on one side. To do this, you can add 12k to both sides and subtract 9 from both sides to get: 63=21k

Finally, divide both sides by 21 so you are left with k= 3

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Please help me thank u!
cricket20 [7]

Answer:

Step-by-step explanation: x is our missing length

c^2=a^2+b^2

where c is the hypotenuse

28^2=24^2+x

x^2=28^2-24^2=784-576=208

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6 0
3 years ago
After a dilation with a center of (0, 0), a point was mapped as (4, –6) → (12, y). A student determined y to be –2. Evaluate the
SpyIntel [72]

Answer:

B. The student incorrectly calculated the scale factor to be –2

Step-by-step explanation:

Given that :

After a dilation with a center of (0, 0), a point was mapped as (4, –6) → (12, y).

The student determined y to be -2

If a figure dilated with a center of (0, 0) and scale factor k, then

(x , y) → (kx , ky)

(4, -6) → (12, y)

k = \dfrac{x'}{x}

k = \dfrac{12}{4}

k = 3

Thus; the scale factor is 3

Now; the y-coordinate can now be calculated as;

ky = (3 × -6)

ky = -18

Therefore; the value of y = -18 and the student incorrectly calculated the scale factor to be -2.

3 0
3 years ago
Can anyone help me with this algebra problem ?
IRINA_888 [86]
There is no solution because the lines do not intersect
6 0
3 years ago
If a car travels 85 kilometers in one and 1/6 hours. At this rate, how far will it travel in four 1/5 hours
mafiozo [28]

Answer:

306 km

Step-by-step explanation:

put both of them to equal in ratio form so now

85 / (7/6) = x / (21/5)

85 * (21/5) = 7/6x

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4 0
4 years ago
Simplify each expression<br> 7(t - 4)
Alexxandr [17]

Answer: 7t-28

Step-by-step explanation: Distribute the 7

3 0
4 years ago
Read 2 more answers
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