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RUDIKE [14]
2 years ago
5

Help me out please 5x+4y=11 3x+5y=4 do this in elimination method (with working)

Mathematics
1 answer:
astra-53 [7]2 years ago
6 0

Answer:

Step-by-step explanation:

(5x+4y) - (3x+5y) = 11-4

5x - 3x + 4y = 5y = 7

2x - y = 7

4(2x - y) = 4*7

8x - 4y = 28

(8x - 4y) + (5x + 4y) = 28 + 11

8x + 5x - 4y +4y = 39

13x = 39

x = 3

Hence, x = 3, and y = -1 (5x = 15, 11 - 15 = -4, -4 / 4 = -1)

Hope this helped!

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NEED HELP FAST!!
Dafna11 [192]

Answer:

see below

Step-by-step explanation:

dilation with a scale factor of 1/3 means the distances to the center shrink by 1/3

so for center (4,-2)

distance of (7,4) is 3 n 6 to center

1/3 of distance = 1 n 2

so (7,4) become (4+1, -2+2) = (5, 0) after the dilation


similarly u can find the other 2 pts

distance of (-2,4) is -6 n 6 to center

1/3 of distance = -2 n 2

so (-2,4) become (4-2, -2+2) = (2, 0) after the dilation


distance of (1, 10) is -3 n 12 to center

1/3 of distance = -1 n 4

so (1,10) become (4-1, -2+4) = (3, 2) after the dilation


plot the new triangle using the 3 pts

8 0
2 years ago
Please help. right answer will be brainliest.
jek_recluse [69]

Answer:

24 square units

Step-by-step explanation:

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3 0
3 years ago
Write the quadratic equation in standard form:<br> 7x + 8 + 2x2<br> 2x + 1 + x2
JulsSmile [24]

Answer:

3x^2 + 9x  +9

Step-by-step explanation:

Given

(7x + 8 + 2x^2) + (2x + 1 + x^2)

Required

The result in standard form

We have:

(7x + 8 + 2x^2) + (2x + 1 + x^2)

Remove brackets

7x + 8 + 2x^2 + 2x + 1 + x^2

Collect like terms

7x+ 2x  + 8 + 1 + 2x^2+ x^2

9x  + 9+ 3x^2

The standard form of a quadratic equation is:

ax^2 + bx + c

So, we have:

9x  + 9+ 3x^2

3x^2 + 9x  +9

5 0
2 years ago
Which is the angle of elevation from the submarine to the boat? &lt;1, &lt;2 ,&lt;4 &lt;3
grigory [225]

Answer:

<1

Step-by-step explanation:

When an observer is at the same level with the submarine, his line of sight above the horizontal upward to the boat would form an angle called the angle of elevation.

Thus, the angle of elevation from the submarine to the boat is marked as <1. <1 is the angle of elevation from the submarine.

6 0
3 years ago
Data Set 1: (2, 2, 3, 4, 4, 5) Data Set 2: (5, 5, 10, 15, 15, 20) The difference between the interquartile ranges of the data se
vlabodo [156]
I R for data set 1 = 4-2 = 2
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Required difference is 10-2 = 8

Its 8.
4 0
3 years ago
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