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3 years ago

You have $28, and you want to get half-dollar coins from the bank to give to children who

Mathematics

1 answer:

worty [1.4K]3 years ago

6 0

Answer:

56 half dollars

Step-by-step explanation:

A half dollar is 1/2 of a dollar so divide 28 by 1/2

28 / 1/2

Copy dot flip

28 * 2/1

56 half dollars

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Which of these is a simplified form of the equation 7y + 8 = 9 + 3y + 2y?

Lera25 [3.4K]

Answer:

7y +8 is the answer for the question

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3 years ago

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1.4t-0.4(t-3.1)=5.8 please help !!

Svetllana [295]

Okay so i cant just post what the answer is i have to type something.
but anyways this is the answer: t= 4.56

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4 years ago

(7w+4h)+ 5(2w+3h)- 2(w+h)

jasenka [17]

7w + 4h + 10w + 15h - 2w - 2h
= 15w + 17h

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3 years ago

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kvv77 [185]

Answer:

the answer is 3

Step-by-step explanation:

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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

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

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4 years ago

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