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lisabon 2012 [21]
3 years ago
15

Solve the system of equations using the elimination method. 2x - 3y = 50; 7x + 8y = -10

Mathematics
2 answers:
Sonbull [250]3 years ago
5 0

Answer:

See the picture and u will get the answer

Klio2033 [76]3 years ago
3 0

Answer:

x=10

y=-10

Step-by-step explanation:

multiply first row by 7

14x−21y=350

​7x+8y=−10

multiply second row by 2

14x−21y=350

​14x+16y=−20

subtract the first row by the second row

−37y=370

solve for y

y=−10

substitute y=-10

14x−21×−10=350

solve for x

x=10

and thats your answer

x=10

y=-10

​

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ivanzaharov [21]

Answer:

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Step-by-step explanation:

8 0
3 years ago
I can’t figure this out at all.
Liula [17]
The fact that this triangle is a right angle triangle makes you now have 2 angles and the 1 side given, so it should be solvable.
First, You know that A=46 and C=90 as it is the right angle, and you know that the sum of any triangle's angles is 180. so now B=180-(90-46)=44
Now to the sides,
sin(B)=opp./hyp.=b/c=8/c=sin(44)
so, c=8/sin(44) which is approximately 11.52 unit length
now, use Pythagoras to find a,
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6 0
3 years ago
Suppose that 24% of the students in the first group answered yes and that 73% of the students in the second group answered yes.
Lera25 [3.4K]

Answer:

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Step-by-step explanation:

24% of the students in the first group answered yes.

73% of the students in the second group answered yes.

More students in the second group were willing to pay $75 for the pair of jeans BECAUSE they were told that the normal price was much higher.

From this information, I guess that the first group was told (by the jeans vendor probably) that the $75 was higher than the normal price of the jeans. This will be the reason why a lesser percentage of students in Group A are willing to purchase the pair of jeans.

This is an example of PRICE DISCRIMINATION effect on decision making. Price discrimination is used in product marketing.

The same pair of jeans in Situation A cost higher than the normal price while in Situation B it cost lower than the normal price. Even though the figure given is static at $75 in both cases, the data that follows in the question tells it as 2 different prices; one favourable to the buyers and another not so favourable to the buyers.

The LAW OF DEMAND also applies here. The higher the price, the lesser the quantity demanded (by a group of students) and the lower the price, the higher the quantity demanded.

5 0
3 years ago
A steel beam can be cut to different lengths for a project. Assuming the weight of a steel beam is proportional to its length, w
aleksandr82 [10.1K]

Answer:

the weight of the steel beam and steel beam length

let y be weight and x be length of it

y=ax

where a is the constant

we can find it if we have two sets of values of y and x


6 0
3 years ago
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I think P im not exactly sure but ik a kite has 1 line of symmetry and i think that’s the closest shape to a kite
6 0
2 years ago
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