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GalinKa [24]
2 years ago
6

Percent of decrease of 57 to 19

Mathematics
1 answer:
guapka [62]2 years ago
4 0

Answer:

-66.66666667 percent

Step-by-step explanation:

Where: 57 is the old value and 19 is the new value. In this case we have a negative change (decrease) of -66.66666667 percent because the new value is smaller than the old value.

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I need to know this geometry answer.
STatiana [176]
2x + 1.5x +20 = 90 
3.5 x = 90-20 
3.5 x = 70 
x = 70/3.5 
x = 20 
angle DAE = 2*20 = 40 
angle CAD = 1.5*20 +20 = 50
3 0
3 years ago
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A jet travels 1464 mi against the wind in 2 hours and 1704 mi with the wind in the same amount of time. What is the rate of the
anastassius [24]
The jet rate against wind is 732 mi an hour (1464/2) and 852 with the wind (1704/2)
6 0
2 years ago
(x-1)^2+(2-x)^2-3(x-5)*(x-5)
Natali5045456 [20]

Answer:

-x^2+24x-70

Step-by-step explanation:

(x-1)^2+(2-x)^2-3(x-5)*(x-5)\\=> (x - 1)^2 + (2 - x)^2 - 3(x - 5)^2\\=> x^2 - 2x + 1 + 4 - 4x + x^2 - 3(x - 5)^2\\=> x^2 - 2x + 5 - 4x + x^2 - 3(x - 5)^2\\=> x^2 - 6x + 5 + x^2 - 3(x - 5)^2\\=> 2x^2 - 6x+5 - 3(x - 5)^2\\=> 2x^2 - 6x+5 - 3(x^2 - 10x + 25)\\=> 2x^2 - 6x+5  - 3x^2+30x-75\\=> -x^2 - 6x + 5 + 30x - 75\\=> -x^2 + 24x + 5-75\\=> -x^2+24x-70

Formula used =

(a-b)^2 = a^2+ 2ab + b^2

8 0
2 years ago
Which equation would best help solve the following problem?
timurjin [86]
Y = yo + Vot - (gt^2)/2

0 = 0 + 31t - 4.9 t^2

0 = -4.9 t^2 + 31t

Answer: option A.
6 0
3 years ago
Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq
TiliK225 [7]

Answer:

The perimeter of rectangle is 18\ cm

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

x=y+5 ----> equation A

120=xy+2x^{2}+2y^{2}  ---> equation B (area of the constructed figure)

substitute the equation A in equation B

120=(y+5)y+2(y+5)^{2}+2y^{2}

120=(y+5)y+2(y+5)^{2}+2y^{2}\\ 120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\ 120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\120=5y^{2}+25y+50\\5y^{2}+25y-70=0

using a graphing calculator -----> solve the quadratic equation

The solution is

y=2\ cm

Find the value of x

x=y+5 ----> x=2+5=7\ cm

Find the perimeter of rectangle

P=2(x+y)=2(7+2)=18\ cm

4 0
3 years ago
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