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salantis [7]
3 years ago
13

Solve equation 5a^2+8=2a

Mathematics
2 answers:
erastovalidia [21]3 years ago
7 0
Your answer a does not equal R
cupoosta [38]3 years ago
5 0
The answer will be 17
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Kristin spent $120 on shirts. Dress shirts cost $40 and t-shirts cost $8. If she bought a total of 7 shirts, then how many of ea
FinnZ [79.3K]

Answer:

The correct answer is: She bought 2 dress shirts and 5 t-shirts

Step-by-step explanation:

Let's marked dress shirts with x and t-shirts with y.

Now we will make equations to solve this problem:

x + y = 7  =>  y = 7 - x

40 x + 8 y = 120

When we replace y = (7 - x) in the previous equation we get:

40 x + 8 (7 -x) = 120  40 x + 56 - 8 x = 120  => 32 x = 120 - 56 =>

32 x = 64  => x = 64/32 = 2 => x = 2

y = 7 - x = 7 - 2 = 5 =>  y = 5

x = 2 dress shirts

y = 5 t-shirts

God with you!!!

8 0
3 years ago
Order these numbers from least to greatest : 0, 1 ,1/2,8/9,49/100,11/20,1/13. *please help!*​
lina2011 [118]

Answer:

8/9,1/2,49/100,11/20, 1/13

Step-by-step explanation:

Here, we want to list the numbers in ascending order

From the smallest to the highest

So we have;

8/9,1/2,49/100,11/20, 1/13

The key to this can be expressing the numbers in their decimal forms

8 0
3 years ago
At a sale, a camera was reduced by $8. This represented 10% of the
Rina8888 [55]

Answer:

The answer is 60.

Step-by-step explanation:

1. 8*10=80 #original price

2. 80.....100%

x...... 75%

=> 100x = 6000 => 60

8 0
3 years ago
Suppose it has been determined that the sales at Ewing Gallery decline after the end of an advertising campaign, with daily sale
gtnhenbr [62]

Answer:

$1050 is the daily sales 5 days after the end of the campaign.

Step-by-step explanation:

We are given the following in the question:

S(x)= 2100(2^{-0.2x})

where S is the daily sales in dollars and x is the number of days after the campaign ends.

We have to find the value of the daily sales 5 days after the end of the campaign.

We put x  = 5 in the equation:

S(5)= 2100(2^{-0.2(5)}) = 2100(2^{-1}) = 1050

Thus, $1050 is the daily sales 5 days after the end of the campaign.

6 0
3 years ago
The sum of a number and 21 equals 30 find the number​
ch4aika [34]

Answer:

The number would be 9.

Step-by-step explanation:

Subtract 21 from 30 to get 9.

7 0
3 years ago
Read 2 more answers
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