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Lubov Fominskaja [6]
2 years ago
7

Put the answer as a decimal and explain how you got the answer thank you -1 5/16=?

Mathematics
2 answers:
kogti [31]2 years ago
5 0

Answer:

-1.3125

explanation:

expeople1 [14]2 years ago
5 0
To write - 21/16 as a decimal you have to divide numerator by the denominator of the fraction.
We divide now 21 by 16 what we write down as -21/16 and we get -1.3125
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What is 5 x 3/7 !!! 15 POINTS !!
Sav [38]

Answer: 13/7

Step-by-step explanation: So you add a one on the bottom of the 5 then multiply it. 5X3=13 and 1X7= 7 then you get 13/7.

8 0
3 years ago
A drawer contains quarters and nickels. There are 200 total coins valuing $30.00. Think about a system of equations that can be
Margaret [11]

Answer:

100

Step-by-step explanation:

Let n and q represent the numbers of nickels and quarters, respectively. A suitable system of equations is ...

  n + q = 200 . . . . . . there are 200 coins in the drawer

  5n +25q = 3000 . . .their value is $30.00

For mixture problems like this, it is often a good idea to substitute for the variable representing the contributor of lower value. That is, we want to write an expression for n that we can use for substitution.

Using the first equation to solve for n, ...

  n = 200 - q

Substituting this into the second equation gives ...

  5(200 -q) +25q = 3000

  1000 +20q = 3000 . . . . . . simplify

  20q = 2000 . . . . . . . . . . . . subtract 1000

  q = 100 . . . . . . . . . . . . . . . . divide by 20

  n = 200 -q = 100 . . . . . . . . the number of nickels, as we want

_____

<em>Comment on the solution</em>

We solved for q, then had to do an extra step to find the value of n that the problem asks for. Had we written q = 200-n and used that for substitution, we would have ended with the equation -20n = -2000. This would give the answer for n directly (with no additional steps required).

Sometimes working with negative numbers is uncomfortable or results in errors, so we chose to use the solution method that would avoid negative numbers.

___

<em>Comment on the problem statement</em>

We are told about coins in a <u>drawer</u>, and we are asked about coins in a <u>jar</u>. There is not enough information to answer the question asked. We have had to assume that both refer to the same quantity of coins—an assumption that is not supported by anything in the problem statement.

8 0
3 years ago
Read 2 more answers
Use a calculator to find an approximate solution to the equation. Round any intermediate work and steps to three decimal places.
Mariana [72]
Given;
6Ln (x + 2.8) = 9.6 

We will transpose 6 in the Ln, so that we will leave Ln alone.
Ln (x + 2.8) = 9.6/6 = 1.6 

we divide the 9.6 to 6 and we get 1.6

x + 2.8 = e^1.6 
e^ for the substitution of Ln

x = e^1.6 - 2.8 
insert the e^(1.6) in the calculator and you will get 4.95303242439511 and subtract 2.8 and you will get the answer.

x = 2.153 
2.153 is the final answer in this question.
4 0
3 years ago
Rewrite using a single positive exponent.<br> 7^9 x 7^-2
lidiya [134]

Answer:

7^7

Step-by-step explanation:

When you multiply exponents with the same base, you add the exponents

Hope it helped!

6 0
2 years ago
The least common multiple of the numbers 15, 12, 8
Ymorist [56]

Answer: LCM of 8, 12, and 15 is 120.

Step-by-step explanation:

I hope this helps!

6 0
2 years ago
Read 2 more answers
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