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3 years ago

Write equations to solve these problems

Mathematics

1 answer:

dangina [55]3 years ago

6 0

Answer:

Step-by-step explanation:

a) 60 = 50x

x = 60 / 50 = 1.20

1.20(100) = 120%

b 50 = 60x

x = 50/60 = 0.83333....

0.83333(100) = 83.333... % or 83⅓%

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sandy has $200 in her bank account. if she writes 6 checks for exactly $19.98 , what expression describesmthe change in her bank

Len [333]

$200 - (6 x $19.98) = $120.12

5 0

3 years ago

Javier's team scores an average of 15.5 points in 4 basketball games. Rhea's team scores an average of 29.5 points in the same

Dmitry [639]

Answer:

well if you subtract 29.5 minus 15.5 youn wil get 14

Step-by-step explanation:

5 0

3 years ago

Given the arithmetic sequence -9,-4, 1, 4,... Which term has a value of 166?

mars1129 [50]

Answer:

36th term

Step-by-step explanation:

The nth term of an arithmetic sequence is

$a_{n}$ = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 9 and d = - 4 - (- 9) = - 4 + 9 = 5 , then

$a_{n}$ = - 9 + 5(n - 1) = - 9 + 5n - 5 = 5n - 14

Equate the nth term to 166 and solve for n

5n - 14 = 166 ( add 14 to both sides )

5n = 180 ( divide both sides by 5 )

n = 36

6 0

3 years ago

Read 2 more answers

In a group of 16 students, the probability of randomly selecting 2 girls in a row without replacing the names back is 1/12. How

Soloha48 [4]

This is a permutation (without replacement) so the probability is the probability of the first event times the probability of the second event. The equation would be ((x)/16)*((x-1)/(16-1))=1/12 don't ask me how I got this I'm not even sure myself. Algebra will give you an answer of x=5 or x=-4 and there can't be -4 girls in the class so there must be 5 girls.

5 0

3 years ago

Niko is 3 times as old as Lila. Niko's age is the same as adding Lila's age to the product of 3 and Amber's age. Niko is 45 year

Ymorist [56]

Answer:

Kameron is 50 years old.

Step-by-step explanation:

We can make equations and start filling in what we already know, assuming $n$ is Niko's age, $L$ is Lila's age, $a$ is Amber's age, and $k$ is Kamerons age.

Our first equation:

n = 3L

We know that Niko is 45, so

45 = 3L

Divide both sides by 3:

L = 15

So, Lila is 15 years old.

Another equation:

n = L + 3a

We already know Niko and Lila's age:

45 = 15 + 3a

Subtract 15 from both sides:

30 = 3a

Divide both sides by 3:

a = 10

So Amber is 10 years old.

Another equation:

k = 2(a + L)

We know Amber and Lila's age:

k = 2(10 + 15)

k = 2(25)

k = 50

So Kameron is 50 years old.

Hope this helped!

8 0

3 years ago