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ss7ja [257]
3 years ago
11

Lara wrote the following statement:

Mathematics
1 answer:
BartSMP [9]3 years ago
7 0

Answer:

do you have a pic

Step-by-step explanation:

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I need help with elimination with substitution. The equations are 3x+4y=19 and 3x+6y=33
olganol [36]
For elimination, multiply one whole equation by negative one (-1), then add or subtract according to your signs. After that, it will be a one-step equation.

3x + 4y = 19          3x + 4y = 19             3x + 4y = 19          -2y = -14        y = 7
3x + 6y = 33     -1 (3x + 6y = 33)          -3x - 6y = -33          -14 / -2

Then you would go back and substitute the value of (y) back into either equation and then solve for the remaining variable (x). Finally, use both values to make an ordered pair.

3x + 4y = 19          3x = -9          x = -3          (-3 , 7)
3x + 4(7) = 19       (-9 / 3)
3x + 28 = 19          

Good Luck

4 0
3 years ago
How do I do surface area
umka2103 [35]
For what shape??
pls answer, then we can get somewhere with this question!! :)
3 0
3 years ago
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Simplify the radical 7√7-2√28
Umnica [9.8K]

ANSWER

3 \sqrt{7}

EXPLANATION

The given radical is

7 \sqrt{7}  - 2 \sqrt{28}

Remove the perfect square from the second radical.

= 7 \sqrt{7}  - 2 \sqrt{4 \times 7}

= 7 \sqrt{7}  - 2 \sqrt{4}  \times  \sqrt{7}

= 7 \sqrt{7}  - 2  \times 2 \times  \sqrt{7}

= 7 \sqrt{7}  - 4 \sqrt{7}

Subtract the like radicals

= 3 \sqrt{7}

7 0
3 years ago
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Help please!!!!!!!!!!​
maksim [4K]

Answer:

110 degrees

Step-by-step explanation:

the angles stay the same even if the size changes!

3 0
3 years ago
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Average after 8 test is 91%. if he gets a 78% on his 9th test what will be the new acerage
Vika [28.1K]
All you need to do is add te averages together then divide them by 2. 91%+78%=169% 169%÷2=84.5% So the new test average is 84.5%
6 0
3 years ago
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