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notsponge [240]
3 years ago
13

Note: We can only use the expanded power rule when there isn't any addition or subtraction. In the example below you need to mul

tiply.
Simplify. (5t + 3)​
Mathematics
1 answer:
Simora [160]3 years ago
4 0
21 hope this helps and your welcome
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A collection of quarters and nickels is worth $14.80. There are 88 coins in all.
ycow [4]
So the equaiton is

number of nickes=n
number of quarters=q

if you have 1 quarter then you have 25 cents so we will represent like this
25q

and nickles is 5n
14.50=1450 cents

so
25q+5n=1480
q+n=88
subtract q from both sides
n=88-q
subsitute into first equation
25q+5(88-q)=1480
25q+440-5q=1480
add like terms
20q+440=1480
subtract 440 from both sides
20q=1040
divide both sdies by 20
q=52
there were 52 quarters
25(52)+5n=1480
1300+5n=1480
subtract 1300 from both sides
5n=180
divide both sides by 5
n=36
there were 36 nickels


nickles=36
quarters=52
8 0
4 years ago
On a field trip a 6th grade class traveled 19.95 kilometer by train, 7 kilometer by bus and 2.3 kilometer by car. How far did th
CaHeK987 [17]
 19.95 + 7 + 2.3 = 29.25 kilometers
7 0
3 years ago
Find the sum<br> 10 + 8 + 0.6 + 0.04
Fudgin [204]

10 + 8 + 0.6 + 0.04 = 18.64

7 0
3 years ago
Read 2 more answers
thare are 7/8 kilograms of salt in the kitchen . mrs. lopez used 7/15 of the salt when she was preparing dinner. how much salt d
ipn [44]

Answer: 49/120kg

Step-by-step explanation:

7/8•7/15 = 49/120

8 0
3 years ago
The students in a class were asked how many siblings they have. The data obtained is represented in the dot plot. The number of
Grace [21]

Answer:

0 Siblings: 4 Students

3 or more siblings: 5 students

Step-by-step explanation:

The numbers at the bottom represents how many siblings they have and the dots represent the number of studens so using this we know:

0 Siblings: 4 Students

1 Sibling: 3 Students

2 Siblings: 3 Students

3 Siblings: 1 Student

4 Siblings: 0 Students

5 Siblings: 2 Students

6 Siblings: 1 Student

7 Siblings: 1 Student

3 or more: 1 + 0 + 2 + 1 + 1 = 5

3 or more siblings: 5 students

5 0
3 years ago
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