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faust18 [17]
3 years ago
8

Evan's science class placed some metal balls on a scale. They used a red ball that weighed 5/13 of a pound, a yellow ball that w

eighed 10/17 of a pound, a green ball that weighed 5/13 of a pound, a blue ball that weighed 4/13 of a pound, and a gray ball that weighed 6/17 of a pound. What was the total weight of the metal balls?
Mathematics
2 answers:
Airida [17]3 years ago
8 0
Jdhdhdbdbdnenwmmekekskdk
kogti [31]3 years ago
7 0
It’s ether 30/17 or just 30 sorry if it’s wrong! Have a blessed day, stay safe!
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A waitress sold 12 ribeye steak dinners and 39 grilled salmon totaling $575.53 on a particular day. Another day she sold 25 ribe
DedPeter [7]

Answer:

The cost of a ribeye steak dinner is $18.60.

The cost of a grilled salmon dinner is $9.03.

Step-by-step explanation:

let r be the cost of a ribeye steak dinner

let g be the cost of a grilled salmon dinner

Represent the two situations using equations:

12r + 39g = 575.53   (equation 1)

25r + 13g = 582.43   (equation 2)

The best method to use for this case is elimination, which is when you get rid of one of the variables by subtracting or adding.

Since the coefficients for "g" are 39 and 13, they can be eliminated if equation 2 was triple itself.

(25r + 13g = 582.43)  X 3

= 75r + 39g = 1747.29  (new equation 2)

Subtract "equation 1" from "new equation 2"

.   75r + 39g = 1747.29

<u>-   12r + 39g = 575.53</u>

.    63r + 0g = 1171.76    <=we only deal with "r" because 0g is nothing

.             63r = 1171.76    <=divide both sides by 63 to isolate r

.                 r = 18.60       <=rounded from 18.599...

The cost of a ribeye steak dinner is $18.60.

Use any one of the equations to solve for "g", the cost of grilled salmon dinners. I will use equation 1.

12r + 39g = 575.53

Substitute r = 18.6

12(18.6) + 39g = 575.53   <=only one variable now

223.2 + 39g = 575.53     <=subtract 223.2 from both sides

39g = 352.33             <=divide both sides by 39 to isolate g

g = 9.03  <=rounded from 9.0341...

The cost of a grilled salmon dinner is $9.03.

4 0
3 years ago
I NEED HELP DONT COMMENT IF YOU'RE DONT KNOW
stepan [7]
<span>12.6≤<span>g+17.4</span></span>  Flip the equation.<span><span>  g+17.4</span>≥12.6</span>  Subtract 17.4 from both sides.<span><span><span>  g+17.4</span>−17.4</span>≥<span>12.6−17.4</span></span><span>  g≥<span>−4.8</span></span>   Answer:  <span>g≥<span>−<span>4.8</span></span></span>
6 0
3 years ago
Suppose the amounts of M&amp;M's a machine dispenses into packages has a normal distribution with a mean of 25 M&amp;M's and a s
emmainna [20.7K]

Answer:

16%

Step-by-step explanation:

The mean is 25, and the standard deviation is 1.

26 is 1 standard deviation above the mean.

According to the empirical rule, 68% of the population is between -1 and +1 standard deviations.  That means that 32% is less than -1 or greater than +1 standard deviations.  So half of that, or 16%, is greater than +1 standard deviations.

5 0
3 years ago
200% of 34 is what number​
Debora [2.8K]

Answer:

68

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
1. A scooter is travelling at a constant speed of 75 km/h
GuDViN [60]
1.
75 km/h
75*20= 1500
Traveled 1500 kilometers

2.
1 mile = 1.60934 km
75/1.60934=
<span>46.6029552487
</span>or 46.6 mph, or below the speed limit
8 0
3 years ago
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