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arlik [135]
3 years ago
11

Please help me now I’m a beginner and I so need help please explain how did you get you answer so I understand thanks

Mathematics
1 answer:
Irina-Kira [14]3 years ago
7 0

Answer:y=2.5(x)

Step-by-step explanation:y=2.5(x)

y=2.5(2)= y=5

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A carpenter purchased 50 ft of redwood and 70 ft of pine for a total cost of $280. A second purchase, at the same prices, includ
iris [78.8K]

The cost per foot of redwood and of pine is $3.5 and $1.5 respectively.

<h3>How to solve simultaneous equation?</h3>

let

  • cost of redwood = x
  • cost of pine = y

50x + 70y = 280

100x + 60y = 440

Multiply (1) by 2

100x + 140y = 560

100x + 60y = 440

subtract to eliminate x

80y = 120

y = 120/80

y = $1.5

substitute y = 1.5 into (1)

50x + 70y = 280

50x + 70(1.5) = 280

50x + 105 = 280

50x = 280 - 105

50x = 175

x = 175 / 50

x = $3.5

Learn more about equation:

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4 0
2 years ago
Helppp plzz I will give brainlist
ra1l [238]
#1. look at the individual probability first.
A dice has 6 sides. The numbers > 2 are {3, 4, 5, 6}. So the chance of rolling a number > 2 is 4/6 or 2/3 simplified.
Multiples of 3 on a dice are {3, 6}. So the chance of rolling a multiple of 3 is 2/6 or 1/3 simplified.

Rolling a dice is an independent event, like flipping a coin the previous roll does not have an effect on the outcome of the next roll. So when you see the word AND connecting the outcomes, you multiply them.

Prob of rolling >2 AND then multiple of 3 = (2/3)*(1/3)
= 2/9

#2. The total socks in the drawer: 8+8+4= 20 socks
The probability of first drawing a blue sock is 8/20 or 2/5 simplified.

Since the question does not say the socks are put back in the drawer, the total number of socks and number of blue socks decrease by 1 after the first draw. This makes the next draw dependent on the first.
The probability of drawing a blue sock is then: 7/19
because there's a blue sock missing.

Probability of drawing blue sock AND then a blue sock (without replacement)
= (2/5)*(7/19)
= 14/95

8 0
4 years ago
Which expression is equivalent to -16 - 9? O A. 16+9 O B. -16 +(-9) O C. -16 + 9 O D. 16 + (-9)​
g100num [7]

Answer:

B

Step-by-step explanation:

because -16+(-9) is essentially the same thing because you're adding the -9 to the -16

7 0
4 years ago
Spin the spinner 90 times to stimulate the 90-day weather forecast. Which type of weather has the lowest observer frequency?
Sidana [21]

Answer:

A.Wind because it has the lowest predicted frequency.

8 0
4 years ago
Read 2 more answers
Rachel and her friends are making necklaces out of beads and straws. They plan to use 12 beads and 5 straws for each necklace. T
bagirrra123 [75]

Answer:

225 necklaces.

Step-by-step explanation:

Assuming that they have the necessary amount of straws to match the beads then we can use the following simple equation to solve this problem.

t = b/12  ... where t is the total amount of necklaces and b is the number of beads you have

t = 2700 / 12

225 necklaces.

For 225 necklaces you would also need 1125 straws since each necklace requires 5 straws to be fully made. Therefore if you have this amount you should not run into any problems.

3 0
4 years ago
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