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Jet001 [13]
3 years ago
14

Solve these simultaneous equations. 4x – 7y = – 5 3x – 2y = – 7 Solution: x=

Mathematics
1 answer:
AlexFokin [52]3 years ago
5 0

Answer:

  1. \huge{x =  -  \frac{5}{4}  +  \frac{7}{4} y}
  2. \huge{x =  -  \frac{7}{3}  +  \frac{2}{3} y}

Step-by-step explanation:

1. 4x - 7y =  - 5

4x =  - 5 + 7y

\boxed{\green{x =  -  \frac{5}{4}  +  \frac{7}{4} y}}

y E R

○○•○○

2. 3x - 2y =  - 7

3x =  - 7 + 2y

\boxed{\green{x =  -  \frac{7}{3}  +  \frac{2}{3} y}}

y E R

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allochka39001 [22]

Answer:

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8 0
3 years ago
In order for smallest to largest is 70% 2/3, 0.62,13/20,0.6
likoan [24]

Answer:

70% = 0.70

2/3 = 0.667

0.62

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8 0
3 years ago
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4 0
3 years ago
=
svet-max [94.6K]

Answer:

The polygon has 9 sides

Step-by-step explanation:

we know that

A regular polygon has equal length sides and equal interior angles

step 1

Find the measure of the interior angle

Remember that

The interior angle plus the exterior angle must be equal to 180 degrees (form a linear pair)

Let

x ----> the measure of each interior angle in the regular polygon

so

x+40^o=180^o

solve for x

x=180^o-40^o=140^o

step 2

Find the number of sides of the regular polygon

we know that

The measure of each interior angle in a regular polygon is given by the formula

x=\frac{(n-2)180^o}{n}

where

n is the number of sides of the polygon

substitute the given values

140^o=\frac{(n-2)180^o}{n}

solve for n

140n=180n-360\\180n-140n=360\\40n=360\\n=9\ sides

therefore

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8 0
3 years ago
Help please.....<br><br> What degree is angle BDA?<br> What degree is angle BCA?
Paladinen [302]
<BOA = 360 -250 = 110
<<span>BDA = 110/2 = 55

<</span><span>BCA = 360 - (90+90+110)
</span><<span>BCA = 360 - 290
<</span><span>BCA = 70</span>
6 0
3 years ago
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