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Alina [70]
3 years ago
7

use the quadratic formula to slove the equation. if necessary, round to the nearest hundredth. x^2+3=-4x

Mathematics
1 answer:
nexus9112 [7]3 years ago
7 0

Answer: The zeros are x= -1 and x= -3

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Dr. Irvine saw 130 patients in one week. The ratio of kids to adults that he saw is 3 to 7. If k represents the number of kids a
Vitek1552 [10]

Answer:

<u>The correct answer is </u>

<u>C. k+d=130 </u>

<u>7k = 3d</u>

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Step-by-step explanation:

1. Let's review the information given to answer the question correctly:

Number of patients Dr. Irvine see in a week = 130

Radio of kids to adults = 3:7 or 3/7

Number of Kids = k

Number of adults = d

2. Let's find the equations system that should be set up to find out how many kids Dr. Irvine see

k + d = 130 (Number of patients Dr. Irvine see in a week)

Including the ratio:

7k = 3d

Replacing d:

d = 130 - k

Now substituting:

7k = 3 * (130 - k)

7k = 390 - 3k

10k = 390

k = 390/10

<u>k = 39</u>

3 0
3 years ago
Help me out bro<br> 7 (x-3)+3 (4-x)= -8
geniusboy [140]

Answer:

x = 1/4

Step-by-step explanation:

remove the parenthesis

collec like terms

caculate

move constant to the right

calculate

divide both sides

7 0
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