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Rama09 [41]
3 years ago
11

Find the opposite of 81

Mathematics
2 answers:
marin [14]3 years ago
6 0
The answer is -81 because if the number is positive then the opposite is negative
RSB [31]3 years ago
4 0
It is -81 the opposite of 81
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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>

<u>Number of kids Dr. Irvine see in a week is 39.</u>

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 quick please --4x-7-3x+4=25
V125BC [204]

Answer:

<h2><em><u>x</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>32</u></em></h2>

Step-by-step explanation:

4x - 7 - 3x + 4 =25

=> 4x - 3x = 25 + 7

=> <em><u>x = 32 (Ans)</u></em>

3 0
3 years ago
Read 2 more answers
Whats the slope of (4,-1) and (-1,4)
Harman [31]

Answer:

<h2>The slope m = -1</h2>

Step-by-step explanation:

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (4, -1) and (-1, 4). Substitute:

m=\dfrac{-1-4}{4-(-1)}=\dfrac{-5}{5}=-1

6 0
3 years ago
What is the vertex of f(x)=x2−8x+15 ?
mr_godi [17]

Answer:

(4,-1)

i strongly believe that is the answer, pls mark as brainlist

4 0
3 years ago
que condiciones debe cumplir las medidas de un triangulo para que puedas asegurar que es un triangulo rectangulo
nirvana33 [79]

Answer:

ENGLISH

One of the angles must equal 90 degrees and the other two angles must add up to 90 degrees.

SPANISH TRANSLATION

Uno de los ángulos debe ser igual a 90 grados y los otros dos ángulos deben sumar 90 grados.

3 0
3 years ago
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