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3 years ago

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

Mathematics

1 answer:

astra-53 [7]3 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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Step 1: d+3 < 1 Step 2: b+6< 9

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Answer:

1) d < -2

2) b < 3

Step-by-step explanation:

1) d+3< 1

subtract both sides by 3

d+3 -3 < 1-3

d<-2

2) b+6< 9

subtract both sides by 6

b+6 -6 < 9 -6

b< 3

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2 years ago

Someone please help me with number 8.

vichka [17]

Measurement of angle DEF would equal 180 because 71 plus 109 is 180

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2 years ago

The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Find the number. Help! I need

JulsSmile [24]

The Answer is 27 because 2+7=9 and 7-2=5

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3 years ago

Find the length x to the nearest whole number. A right triangle has a vertical leg of length x units, a base leg with a length o

wel

Complete Question

The diagram for this question is shown on the first uploaded image

Answer:

The value of x is $x = 274 \ unites$

Step-by-step explanation:

From the question we are told that

The length of the vertical length is $x$

The length of the base leg is L = 330 + d units

The length of the bisecting line segment is h

The base angle is $\theta = 28^o$

The angle between d and line segment is $\theta_1 = 56^o$

For the first angle

$Tan \theta_1 = \frac{x}{d}$

=> $d = \frac{x}{Tan \theta _1}$

For the whole big triangle

$Tan \theta = \frac{x}{330 + d}$

=> $d = \frac{x}{Tan \theta } -330$

So equating the both d

$\frac{x}{Tan \theta _1} = \frac{x}{Tan \theta } -330$

Substitute values

$\frac{x}{Tan (56)} = \frac{x}{Tan (28) } -330$

$0.6745 x = 1.880x -330$

$1.20549 x = 330$

$x = 274 \ unites$

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3 years ago

How would I turn 0.46 into a fraction

Pepsi [2]

Step 1: 0.46 = 46⁄100
Step 2: Simplify 46⁄100 = 23⁄50 hope this helped u

6 0

3 years ago

Read 2 more answers