i don't understand the math. please help.

Answer:

$3000

$1000

Step-by-step explanation:

the formula for simple interest = principal x time x interest rate

let the amount invested in the 2% investment be a

let the amount invested in the 3% investment be (4000 - a)

(a x 0.02 x 1) + ([4000 - a] x 0.03 x 1) = $90

0.02a + 120 - 0.03a = 90

Collect like terms and solve for a

0.01a = 30

a = $3000

The amount invested in the 3% investment be (4000 - a)  = $4000 - $3000 = $1000

Answer:

x + 3y = 4x + y

Step-by-step explanation:

it looks like both sides weight the same, also each triangle represents an x and each square represents a y

Answer:

P = 6d ; P = 5d + 15

Step-by-step explanation:

Given that :

Keith = 6 pages per day

Tameka = 5 pages per day

Tameka has already read 15 pages

If d = Number of days ; p = pages read

Keith :

Pages read, p = pages read per day * Number of days, d

P = 6d

Tameka :

Pages read, p = (pages read per day * Number of days, d) + pages read already

P = 5d + 15

The system of equations to represent the number of pages read per day by Keith and Tameka, using d for days and p for pages are,

[tex]\\P=6d[/tex]

[tex]P=5d+15[/tex]

A system of equation is the set of equation in which the finite set of equation is present for which the common solution is sought.

Two students are reading a book.  Keith reads 6 pages a day. Equation for Keith, where d for days and p for pages can be given as,

[tex]P=6\times d\\P=6d[/tex]

Tameka reads 5 pages a day, but he starts sooner and has already read 15 pages. The equation for Tameka, where d for days and p for pages, can be given as,

[tex]P=5\times d+15\\P=5d+15[/tex]

Hence, the system of equations to represent the number of pages read per day by Keith and Tameka, using d for days and p for pages are,

[tex]\\P=6d[/tex]

[tex]P=5d+15[/tex]

Learn more about the system of equations here;

https://brainly.com/question/13729904

Answer:

-1 -y/5

Step-by-step explanation:

-5x + y = 1

Subtract yy from both sides.

-5x=1-y

−5x=1−y

2 Divide both sides by -5−5.

x=-\frac{1-y}{5}

x=−

5

1−y

-10x+2y=-2

Factor out the common term 22.

2(5x+y)=-2

2(5x+y)=−2

2 Divide both sides by 22.

5x+y=-1

5x+y=−1

3 Subtract yy from both sides.

5x=-1-y

5x=−1−y

4 Divide both sides by 55.

x=\frac{-1-y}{5}

x=

5

−1−y

Answer:

[tex]10^7[/tex]

Step-by-step explanation:

There are [tex]7[/tex] zeroes in the number [tex]10,000,000[/tex]. Therefore, [tex]10,000,000[/tex] can be written as [tex]\fbox{$10^7$}[/tex].

*Any number written as [tex]10^n[/tex] will be equal to [tex]1[/tex] followed by [tex]n[/tex] zeroes.

Answer:10^7

Step-by-step explanation:

Answer: D

Step-by-step explanation: I got this question on a test

Answer:

theres some balls in my mouth

Step-by-step explanation:

Answer:

3 cups or 2.99254101 cups

Step-by-step explanation:

16 cups = 3785.4 mL

Convert 708 Milliliters to Cups

To calculate 708 Milliliters to the corresponding value in Cups, multiply the quantity in Milliliters by 0.0042267528198649 (conversion factor). In this case we should multiply 708 Milliliters by 0.0042267528198649 to get the equivalent result in Cups:

708 Milliliters x 0.0042267528198649 = 2.9925409964644 Cups

708 Milliliters is equivalent to 2.9925409964644 Cups.

How to convert from Milliliters to Cups

The conversion factor from Milliliters to Cups is 0.0042267528198649. To find out how many Milliliters in Cups, multiply by the conversion factor or use the Volume converter above. Seven hundred eight Milliliters is equivalent to two point nine nine three Cups.

Definition of Milliliter

A milliliter (also written "millilitre", SI symbol ml) is a non-SI metric system unit of volume which is commonly used as liquid unit. It is equal to 1/1000 liter, or one cubic centimeter, therefore, 1ml = 1/1000 L =1 cm3.

Definition of Cup

The cup is an English unit of volume, most commonly associated with cooking and serving sizes. It is traditionally equal to half a liquid pint in either US customary units or the British imperial system but is now separately defined in terms of the metric system at values between 1⁄5 and 1⁄4 of a liter. Because actual drinking cups may differ greatly from the size of this unit, standard measuring cups are usually used instead. In the United States, the customary cup is half of a liquid pint or 8 U.S. customary fluid ounces. One customary cup is equal to 236.5882365 millilitres.

The answer is 2.99254101 cups (rounded to the nearest cup it is 3 cups!)

Hope this helps!! ^^

Answer:

D, 2. 24

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

$8 ; 66 cents

Step-by-step explanation:

Given that:

Worth of penny, dimes and Nickel in cents and dollars

Nickel, n = 5 cents = $0.05

Dimes, d = 10 cent = $0.1

Penny, p = 1 cent = $0.01

Multiplying the number of each coin with its respective value ;

386(0.01) + 58(0.05) + 19(0.1)

$3.86 + $2.9 + $1.9

= $8.66

Changing it to dollar ,

$8.66 dollars = 8 dollars ;

$0.66 = 66 cents

Answer:

-1.85

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

the first number x in (X,Y) is the domain and the second number y is the range. Domain is the set of all x values and range is the set of all y values

Answer:

Width=22, Length=27, Area= 594

Step-by-step explanation:

Let the width if the rectangle be represented by x

If the length is 5 more than the width

Length =x+5

The perimeter is given by

2(x)+2(x+5)=98

2x+2x+10=98

4x=88

x=22

Width=22

Length=27

Area= 22*27=594

Answer:

c

Step-by-step explanation:

i took the quiz

Answer:

The answer is C) 15

Step-by-step explanation:

Answer:

8 + 16k

Hope this helps

Step-by-step explanation:

Answer:

How are we supposed to know what X is

Step-by-step explanation:

This doesn't make sense emphasize more

Answer:x=23 because 23-4=19 which equals to one side of the triangle

Step-by-step explanation:

Uhmm I got it right :D

Answer: The equation would be 250 + 20x = whatever the amount is  

They would pay $ 24,250 to rent it

Step-by-step explanation:

Answer:

Step-by-step explanation:

It's a simple question as we know:

y-y1=m(x-x1)

y-20=12(x-3)

y=12x-36+20

y=12x-16

Now, your line is in slope intercept form you can compare it with

y=mx+c

m=12 and c=16. You can also put your point to verify your answer.

Answer:

Step-by-step explanation:

Step-by-step explanation:

721/100

It is correct answer

Answer:

D) she can divide 7 by 2

Step-by-step explanation:

As, Division is not same as multiplication, so not the a option

And b doesn't have the right values

C is also wrong bc it have multiplication

So D is right

Answer:

47C + 9

Step-by-step explanation:

arrange the like terms so you can combine them (5c + 42c) (-3 + 12)

Answer: -3 + 47C +12

Step-by-step explanation:

Answer:

The answer is indeed 1.

Step-by-step explanation:

You are going to plug in the y values, and then plug in the choices for x to see which makes the statement true.

[tex]x + y = 6 - x \\ x + 4 = 6 - x \\ \\ (4) + 4 = 6 - (4) \: is \: 8 = 2\: \: \: |no| \\ \\ (2) + 4 = 6 - (2) \: is \: 6 = 4 \: \: \: |no| \\ \\ (3) + 4 = 6 - (3) \: is \: 7 = 3 \: \: \: |no| \\ \\ (1) + 4 = 6 - (1) \: is \: 5 = 5 \: \: \: |yes| [/tex]

Answer:

-48

Step-by-step explanation:

-54+-32+-70+-25+-65,+42 = -288

-288÷6= -48