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Stella [2.4K]
3 years ago
5

A library wants to buy a new computer that cost $989.99. So far, the library has collected $311.25 in donations.About how much m

ore money does the library need to buy the computer?
Mathematics
2 answers:
nlexa [21]3 years ago
3 0
Subtraction, 989.99 - 311.25 = $678.74 (answer)
olga nikolaevna [1]3 years ago
3 0
$678.74 because you need $989.99 but you only have $311.25 so you need to subtract what you have and what you need( $989.999 $311.25 ) and you would get $678.74 now to check you have to add what you have and what you need($678.74 $311.25) and get $989.99
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A certain shade of pink is created by adding 3 cups of red paint to 7 cups of white paint.
vazorg [7]

Answer:

7/3 is constant of proportionality and, 3/7 of a cup of red paint should be added to 1 cup of white paint.

Step-by-step explanation:

Constant of proportionality is the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality.

To make color pink,

for every 3 cups of red , we need 7 cups of white.

Let 'r' be the cups of red required

let 'w' be the cups of white required

so , as per the question

for 3 r we need = 7 w

r = 7/3 w

so, 7/3 is constant of proportionality and, 3/7 of a cup of red paint should be added to 1 cup of white paint.

You already have the answer! ;)

4 0
3 years ago
if someone ran 2 miles on Monday, 5 miles on Wednesday, 6 miles on Thursday, 3 miles on Saturday. what percent of total miles di
kogti [31]

Answer:

12.5 %

Step-by-step explanation:

2 + 5 + 6 + 3 = 16

2 (1/16) = 12.5 %

7 0
3 years ago
Read 2 more answers
Find the general term of the arithmetic sequence whose first term is 4 and common difference is 2
Pani-rosa [81]
For arithmetic sequence

a_{n}=a_{1}+d(n-1)

a_{1}=4, d=2

a_{n}= 4+2(n-1)

a_{n}=4+2n-2=2+2n

a_{n} = 2+2n

Sometimes the answer could be asked in the form

a(n)=4+2(n-1),

Sometimes it could asked in simplified form
a(n)= 2n+2

3 0
3 years ago
Gcf of 18m x 18m and 7m
IrinaVladis [17]
The Gcf of 18m x 18m and 7m is 1
6 0
3 years ago
Need to find A and B, I already found C
Semenov [28]
I'm going to assume you've learn sin, cos, and tan. To find a you must do:
sin^{ - 1}  =  \frac{a}{12}
Once you find a, you can use the Pythagorean Theorem to find b:
{a}^{2}  +  {b}^{2}  =  {c}^{2}
Or you can do:
cos^{ - 1}  =  \frac{b}{12}
You can find these functions on a scientific calculator. Let me now if you need more help.

5 0
3 years ago
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