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azamat
2 years ago
15

2x+7y= -5 5x - 7y = 14

Mathematics
2 answers:
il63 [147K]2 years ago
8 0

Answer:

19

Step-by-step explanation:

Jlenok [28]2 years ago
5 0

Let's solve for x:

2x+7y=−5

Step 1: Add -7y to both sides.

2x+7y+−7y=−5+−7y \\ 2x=−7y−5

Step 2: Divide both sides by 2.

\frac{2x}{2}  = \frac{7y−5}{2}\\ x=  \frac{ - 7}{2}  y+ \frac{ - 5}{2}

Therefore, the answer for the first one will be x = -7/2 y + -5/2.

Let's solve for x.

5x−7y=14

Step 1: Add 7y to both sides.

5x−7y+7y=14+7y \\5x=7y+14

Step 2: Divide both sides by 5.

\frac{5x}{5} = \frac{7y + 14}{5} \\ x= \frac{7}{5} y+ \frac{14}{5}

Therefore, the answer for the second one will be x = 7/5 y + 14/5

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Figure A is translated 3 units right and 2 units up. The translated figure is labeled figure B. Figure B is reflected over the x
mojhsa [17]

Answer:

A Is congruent to B and B Is congruent to C

Step-by-step explanation:

Given Figures A, B and C on a coordinate plane with the coordinates below:

Triangle A has points (1, -2), (3, -2), (3, -5).

Triangle B has points (4, 0), (6, 0), (6, -3).

Triangle C has points (4, 0), (6, 0), (6, 3).

The fact that each triangle is a right triangle only shows that the triangles are similar.

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Therefore, for Triangle A to be congruent to Triangle C, Triangle A must be congruent to Triangle B and Triangle B must be congruent to Triangle C.

7 0
2 years ago
If y = 10x - 1 and the value of x is 10, what is the value of y?
KatRina [158]

Answer:

99

Step-by-step explanation:

99 because x= 10 so 10 times 10 is 100 - 1 will = 99

5 0
3 years ago
Jake has decided to invest in three business ventures. The total cost of investing in all three ventures is $15,000. The combine
Arte-miy333 [17]
X = first venture, y = second venture, z = third venture

x + y + z = 15,000
x + z = y + 7000
3x + 2y + 2z = 39,000
these are ur equations.....

x + y + z = 15,000
x - y + z = 7000
--------------------add
2x + 2z = 22,000

x + y + z = 15,000....multiply by -2
3x + 2y + 2z = 39,000
-------------------
-2x - 2y - 2z = - 30,000 (result of multiplying by -2)
3x + 2y + 2z = 39,000
------------------add
x = 9,000

2x + 2z = 22,000
2(9000) + 2z = 22000
18,000 + 2z = 22000
2z = 22000 - 18000
2z = 4000
z = 4000/2
z = 2,000

x + y + z = 15,000
9000 + y + 2000 = 15,000
11,000 + y = 15,000
y = 15,000 - 11,000
y = 4,000

first venture (x) = 9,000 <==
second venture (y) = 4,000 <==
third venture (z) = 2,000 <==
7 0
3 years ago
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A geologist visits 40 volcanoes in Alaska and California. 15% of the volcanoes are in California.
kotegsom [21]

Answer:

<h2>Most explained:</h2>

40% = 100%

15 = (100% - 15% = 85%) 85% in Alaska

California = 15% of 40 = (0.15 x 40) = 6

Alaska = 85% of 40 = (0.85 x 40) = 34

<h2>The simple way (or the way i found it simple):</h2>

<h3>40 - 15 = 34</h3><h3>15% of 40 = 6</h3>

<h3>(I found the simple way after i solve the first way)</h3>

Bye, i hope this helps.

<h3 />

3 0
2 years ago
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