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goldenfox [79]
3 years ago
15

Triangle ABC is congruent to triangle DEF .

Mathematics
1 answer:
Otrada [13]3 years ago
7 0

The answer is B. Sorry if I'm wrong.

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What is the solution of the system?
spin [16.1K]
The Answer is b: x = 18, y = -20

Proof:

Solve the following system:
{4 x + 3 y = 12 | (equation 1)
{7 x + 5 y = 26 | (equation 2)

Swap equation 1 with equation 2:
{7 x + 5 y = 26 | (equation 1)
{4 x + 3 y = 12 | (equation 2)

Subtract 4/7 × (equation 1) from equation 2:
{7 x + 5 y = 26 | (equation 1)
{0 x+y/7 = (-20)/7 | (equation 2)

Multiply equation 2 by 7:
{7 x + 5 y = 26 | (equation 1)
{0 x+y = -20 | (equation 2)

Subtract 5 × (equation 2) from equation 1:
{7 x+0 y = 126 | (equation 1)
{0 x+y = -20 | (equation 2)

Divide equation 1 by 7:
{x+0 y = 18 | (equation 1)
{0 x+y = -20 | (equation 2)

Collect results:

Answer: {x = 18, y = -20
6 0
3 years ago
What is 45 divided by 30
Yuliya22 [10]

Answer:

1.5 or 1 1/2

Step-by-step explanation:

4 0
3 years ago
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Mr Jackman gives $32.00 to four children to share equally how much will each of his children get
Reil [10]
32 divide by 4= $8 each kid
7 0
3 years ago
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What is the measure of angle x?
RSB [31]

Answer:

128 degrees! (veritcal angles)

4 0
3 years ago
What should be multiplied to 288 to become it a perfect square​
AfilCa [17]

Greetings from Brasil...

Follow the reasoning.

288 ÷ 2 = 144

and 144 its a perfect square (144 = 12²)

It is visible that if we multiply 288 by 1/2, we will obtain a perfect square, but we will do this via a simple equation

288 · X = 144

X = 144 ÷ 288

X = 0,5  ⇔ X = 1/2

6 0
3 years ago
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