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3 years ago

A number decreased by twelve is forty-five. helpp.

Mathematics

2 answers:

FinnZ [79.3K]3 years ago

8 0

Answer:

Step-by-step explanation:

57-12=45. Simple subtraction/addition

Nookie1986 [14]3 years ago

7 0

Answer:

Step-by-step explanation:

In math decreased means subtract, so you would add in this case to find out what the number is because the opposite of subtract is addition

Problem listed below

?-12=45

57-12=45

Hope this helps :)

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The number of students at Marita’s school decreased to 98% of last year’s number. Currently, there are 1,170 students. How many

77julia77 [94]

Answer:

1194 students last year

Step-by-step explanation:

The problem statement tells us ...

98% × (students last year) = 1170

Dividing by 98%, we get ...

1170/0.98 = (students last year) = 1193.88 ≈ 1194

___

Check

1170/1194 = 0.979899... ≈ 0.98 = 98%

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2 years ago

5≤3y+8<17 solve and graph

Scorpion4ik [409]

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3 years ago

Mrs. Adams deposited $12,000 into an account that earns an annual simple interest rate of 3.25%. She makes no other deposits or

lisabon 2012 [21]

Answer:

Mrs. Adams will earn $3,120 of interest at the end of year 8.

Step-by-step explanation:

Simple Interest

In simple interest, the money earns interest at a fixed rate, assuming no new money is coming in or out of the account.

We can calculate the interests earned by an investment of value A in a period of time t, at an interest rate r with the formula:

$I=A.r.t$

Mrs. Adams deposited an amount of A=$12,000 into an account that earns an annual simple interest rate of r=3.25%. We must find the interest earned in t=8 years. The interest rate is converted to decimal as:

$r=3.25/100=0.0325$

The interest is then calculated:

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Mrs. Adams will earn $3,120 of interest at the end of year 8.

7 0

3 years ago

Question 1

enyata [817]

Answer:

x = 1/8

Step-by-step explanation:

Solve for x by simplifying both sides of the equation, then isolating the variable.

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2 years ago

Maria calls her mother 5 times every week. Let w represent the number of weeks and c represent the total number of times Maria c

galina1969 [7]

Answer:

Equation: 5w = c

Step-by-step explanation:

${ \tt{w \: \alpha \: c}} \\ { \tt{w = kc}}$

k is a constant of proprtionality

${ \tt{1 = (k \times 5)}} \\ { \tt{k = \frac{1}{5} }}$

» Therefore, equation becomes:

${ \tt{w = \frac{1}{5}c }} \\ \\ { \boxed{ \tt{5w = c}}}$

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2 years ago