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3 years ago

must fill out whole sheet, and you don't have to explain, just the answer will be fine. 100 points + brainliest for best answer

Mathematics

1 answer:

krek1111 [17]3 years ago

6 0

1.a 2 + 22s

1 b. -6a + 8

2a. 81r + 18

2b. 132+ 50p

3a. -36 - 4r

3b. 40 + -25m

4a. 6+16r

4b. -28z + 7

5a. 96y - 40

5b. -99u -72

6a. 77 - 63m

6b. -40 - 35p

7a. -72v + 6d

7b. -45b - 9c

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Janson has quarters and dimes in his pocket. he counted 42 coins that added up to $7.50

vlada-n [284]

Answer:

28 quarters and 5 dimes

7(Q)+5(D)

7(4)+5(10)

28Q 50D Q=quarters D=dimes

it would be more efficient to do the substitution method bc its faster and easier

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3 years ago

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Which of the following numbers is a perfect number (Hint: try to use the

Nitella [24]

C. 496 is the perfect number

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4 years ago

Ryan is performing an experiment. He starts with a solution that has a temperature of 12.2°C. He lowers the temperature 5 times

Anon25 [30]

Answer: The equation that can be used to find x, is given by

$-14.61^\circ C=12.2^\circ C-5x$

Step-by-step explanation:

Let the number of degrees he lowered the temperature by each time be 'x'.

Temperature he starts with = 12.2° C

Temperature he stopped with = -14.61° C

According to question, it is said that he lowers the temperature 5 times by the same amount each time.

So, it becomes,

$-14.61=12.2-5x\\\\-14.61-12.2=-5x\\\\-26.81=-5x\\\\\frac{26.81}{5}=x\\\\5.362^\circ C=x$

Hence, the equation that can be used to find x, is given by

$-14.61^\circ C=12.2^\circ C-5x$

8 0

3 years ago

after allowing 20 percent discount on the marked price of a radio 15 percent vat is levied on it , if its price become rs 22080

Kamila [148]

Answer:

Step-by-step explanation:

Hello, let's say that the price was P, a real number.

After 20% discount it become P - 20% * P = P* (1-20%) = P * (1 - 0.2)

= P * 0.8

And then we take 15% for the VAT, the new price become P * 0.8 * ( 1 + 15%)

= P * 0.8 * 1.15

And this is equal to 22080, so

P * 0.8 * 1.15 = 22080

and the amount of the VAT is P *0.8 * 0.15

$=\dfrac{22080}{1.15}*0.15=2880$

Hope this helps.

Thank you.

5 0

3 years ago

I need help REALLY FAST what is the distance between the points (-1, -3 3/4) and (-1, 4 1/2) ?

kodGreya [7K]

Answer:

8 1/4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)

Algebra II

Distance Formula: $\displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Step-by-step explanation:

Step 1: Define

Identify

Point (-1, -3.75)

Point (-1, 4.5)

Step 2: Find distance d

Simply plug in the 2 coordinates into the distance formula to find distance d

Substitute in points [Distance Formula]: $\displaystyle d = \sqrt{(-1--1)^2+(4.5--3.75)^2}$
[√Radical] (Parenthesis) Subtract: $\displaystyle d = \sqrt{(0)^2+(8.25)^2}$
[√Radical] Evaluate exponents: $\displaystyle d = \sqrt{0+68.0625}$
[√Radical] Add: $\displaystyle d = \sqrt{68.0625}$
[√Radical] Evaluate: $\displaystyle d = 8.25$

4 0

3 years ago