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IRINA_888 [86]
3 years ago
9

The length of a rectangle is 10cm greater than it's width,the perimeter is 70cm.find the length nd width

Mathematics
1 answer:
LuckyWell [14K]3 years ago
5 0

Step-by-step explanation:   TS 5 15    8 36

L = W + 10  cm

Perimeter = 2(L + W)

Perimeter = 70  = 2(W +10 +W)

                70/2  = 2(W +10 +W) / 2

                   35  =  (W +10 +W)

                   35  =  2W +10  

            35 - 10  =  2W +10  - 10

                  25  = 2W

                  25/2  = 2W/2

                  25/2 cm = W         W = ??  cm

L = W + 10  cm

L = 25/2 + 10  cm                     L  = ??  cm

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But the proper way to write it is 9y^2+1350y+45000

When y=4, we get 9(4^2)+1350(4)+45000=9(16)+54000+45000=144+99000=99144

So the new area would be 99144 ft^2

Hope this helped!

6 0
3 years ago
If I multiplied these binomials (x - 3) + (4x + 2) what would be the final product?
zlopas [31]

Answer: 4x^2 - 10x - 6

Step-by-step explanation:

You can use FOIL to do this. First terms, Outer terms, Inner terms, Last terms.

(x - 3)(4x + 2)

First terms: x * 4x = 4x^2

Outer terms: x * 2 = 2x

Inner terms: -3 * 4x = -12x

Last terms: -3 * 2 = -6

Now add these together:

4x^2 + 2x - 12x - 6 = 4x^2 - 10x - 6

8 0
3 years ago
Read 2 more answers
Can someone please help me with this question
ZanzabumX [31]

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Step-by-step explanation:

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3 years ago
Realiza estas operaciones y expresa el resultado en metros 1m-(5dm3cm) (2hm4m)+35dam (3hm6dam)+(8dam5m) (2m5dm6cm)-85cm
ivolga24 [154]

Answer:

126.109,63 m

Step-by-step explanation:

Por conveniencia, todas las unidades se convierten a m

1000 m = 1 km

100 m = 1hm

10m = 1 presa

1 m = 1 m

10dm = 1m

100 cm = 1 m

1000 mm = 1 m

1m- (5dm3cm) (2hm4m) + 35dam (3hm6dam) + (8dam5m) (2m5dm6cm) -85cm

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= 1 m- (0.5 +0.03) (200 + 4m) +350 (300 +60) + (80 + 5m) (2m + 0.5 + 0.06) -85/100

= 1 m- (0,53) (204 m) +350 (360) + (85 m) (2,56) -85/100

= 1 m- (108,12 m) +126000+ (217,6) - 0,85

= 126.109,63 m

For convenience all units are converted to m

1000m = 1km

100 m= 1hm

10m = 1 dam

1m= 1m

10dm= 1m

100 cm= 1 m

1000 mm= 1m

1m-(5dm3cm) (2hm4m)+35dam (3hm6dam)+(8dam5m) (2m5dm6cm)-85cm

= 1m-(5/10 +3/100) (2*100 +4m)+35*10 (3*100 +6*10)+(8*10+5m) (2m+5/10+6/100)-85/100

= 1m-(0.5 +0.03) (200 +4m)+350 (300 +60)+(80+5m) (2m+0.5+0.06)-85/100

= 1m-(0.53) (204m)+350 (360)+(85m) (2.56)-85/100

= 1m-(108.12m)+126000+(217.6)- 0.85

= 126,109.63 m

5 0
3 years ago
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Shkiper50 [21]

Answer:

790,000 is the answer

8 0
3 years ago
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