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siniylev [52]
2 years ago
6

Stoplight A changes color every 42 seconds and Stoplight B changes color every 30 seconds. Both stoplights changed color 10 seco

nds ago. After how many seconds will the stoplights change color at the same time again
Mathematics
1 answer:
Tomtit [17]2 years ago
4 0
42-30= 12, 12x42=504s until they change at the same time. 504-10= 494s from 10s ago
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laura makes a 10.5% commisssion on each of her sales. how much does she make when she sells a house for $85,000?
antiseptic1488 [7]
I think it's 8925 since you would do 85000 times .105
4 0
4 years ago
Read 2 more answers
There are five consecutive odd integers. The sum of the three smallest is 3 more than the sum of the two largest. Find the integ
Cerrena [4.2K]

Answer:

11 13 15 17 19

Step-by-step explanation:

We will solve this word problem using 2k+1 which is one of the general forms of an odd integer.

Let 2k+1 be the first odd integer.

(2k+1) + (2k+3) + (2k +5) =  (2k+7) + (2k +9) + 3 (the +3 is to accommodate for the left side being 3 more than the right)

Solve for k

6k + 9 = 4k + 19

6k - 4k + 9 = 4k-4k + 19

2k + 9 = 19

2k + 9 - 9 = 19 - 9

2k = 10

2k/2 = 10/2

k = 5

To get the first digit in the series plug in 5 for k

2k+1

2(5) + 1

10 + 1 = 11

So our series is 11, 13, 15, 17, 19

Let's test it.

11 + 13 +15 = 39

17 + 19 = 36

So we are correct, the first 3 integers are 3 more that the sum of the last 2.

6 0
3 years ago
Which square number is closest to 1000?
bezimeni [28]
Thirty-one<span> is the closest square to 1000</span>
8 0
3 years ago
Need help with this math question please
lesya692 [45]

Answer:

See below for answer.

Step-by-step explanation:

RP/RT =RQ/RS                  Given

∠R = ∠R

ΔPQR similar to Δ TSR      If the measures of two sides of a triangle are proportional to the measures of two corresponding sides of another triangle and their included angles are congruent, then the triangles are similar.

3 0
3 years ago
The number of bacteria present in a culture after t minutes is given as where k is a constant. if there are 8520 bacteria presen
andrew-mc [135]
Given that the situation has been modeled by the formula:
B=1000e^(kt)
given that B=8520 after t=15 min
then the value of k will be solved as follows:
plugging in the values in the formula and solving for k
8520=1000e^(15k)
8.52=e^(15k)
solving for k
15k=ln(8.52)
hence
k=ln(8.52)/15
k=0.1428
k=0.143
8 0
3 years ago
Read 2 more answers
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