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3 years ago

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Mathematics

2 answers:

MArishka [77]3 years ago

6 0

1. b + (5 x 2)
2. 3x + 10y + 5

Mashutka [201]3 years ago

4 0

1. b + (5*2)
2. 3x +10y+5
The coefficient of y is 10
The constant is 5

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Serena drank nine and six tenths ounces of juice yesterday.Four and seventy-five hundreths ounces of the juice were apple juice.

kicyunya [14]

Serena drank 9.6 oz of juice. If 4.75 oz were apple juice, then she drank 9.6-4.75=4.85 oz of orange juice.

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4 years ago

Patty has 123 CDs in her music collection. Of the 123 CDs, 27 are country music. Estimate the percent of patty's CD that are cou

Alik [6]

Let's set up a proportion.

27 x
___ ___

123 100

Solve for x.

27 x 100 = 2700
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I'm not 100% positive, but I hope this helps! :)

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3 years ago

A newspaper carrier has $3.65 in change he has four more quarters then dimes but two times as many nickels as quarters how many

77julia77 [94]

Answer:

The number of quarter coins is 9, the number of dime coins is 5 and the number of nickel coins is 18

Step-by-step explanation:

Let

x ----> the number of quarter coins

y ---> the number of dime coins

z ---> the number of nickel coins

Remember that

$1\ quarter=\$0.25$

$1\ dime=\$0.10$

$1\ nickel=\$0.05$

we know that

$0.25x+0.10y+0.05z=3.65$ ----> equation A

$x=y+4$

$y=x-4$ ----> equation B

$z=2x$ ----> equation C

Solve the system by substitution

substitute equation B and equation C in equation A

$0.25x+0.10(x-4)+0.05(2x)=3.65$

solve for x

$0.25x+0.10x-0.40+0.10x=3.65$

$0.45x=3.65+0.40$

$0.45x=4.05\\x=9$

<em>Find the value of y</em>

$y=x-4$

substitute the value of x

$y=9-4=5$

Find the value of z

$z=2x$

$z=2(9)=18$

therefore

The number of quarter coins is 9, the number of dime coins is 5 and the number of nickel coins is 18

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4 years ago

What is (11x-8)+7(x-1)

Olenka [21]

18x- 15
hope it helps
(11x-8)+7(x-1)
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(11x-8)+(7x-7)
___________
(11x+7x)+(-8-7)
___________
18x-15

6 0

3 years ago

Read 2 more answers

Help! A glass of hot cider is 105°C at the time t = 0. It is surrounded by air at a constant temperature of 25°C . If stirred, i

julia-pushkina [17]

It takes 2.45 seconds for the temperature of the glass of hot cider to be 94°C

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

The temperature of the glass cider (C) at time t is given by:

$C(t)=25+80(1.062)^t\\\\When\ C=94^oC,hence:\\\\94=25+80(1.062)^{-t}\\\\t=2.45\ s$

It takes 2.45 seconds for the temperature of the glass of hot cider to be 94°C

Find out more on equation at: brainly.com/question/2972832

#SPJ1

8 0

2 years ago