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navik [9.2K]
3 years ago
13

What is the correct evaluation of 3x2 + 4x - 2y2 + 4y + 5, when x is equal to -1 and y is equal to 5?

Mathematics
1 answer:
Julli [10]3 years ago
8 0
3x2+4(-1)-2(5)2 +4(5)+5=
__________________
6+-4-10+25
_________
31-14=17
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X+y= -9<br> x+2y= -25<br><br> According to the system of equations above, what is the value of y?
Varvara68 [4.7K]
Try this option:
if x+y=-9 is I (one)
and x+2y=-25 is II (two), then
if II-I, then (x+2y)-(x+y)=-25+9 ⇔ y=-16.
6 0
3 years ago
Which of the equations below has a slope of 1/4
kenny6666 [7]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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4 times a number is 32 less than the square of that number. Find the negative solution.
zvonat [6]

Answer:

<u>The negative solution is -4</u>

Step-by-step explanation:

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

x = a number

4x = x² - 32 (4 times a number is 32 less than the square of that number)

2. Let's solve for x and find the negative solution:

4x = x² - 32

-x² + 4x + 32 = 0

x² - 4x - 32 = 0 (Multiplying by - 1)

(x - 8) (x + 4) = 0

(x₁  - 8) = 0

(x₂ + 4) = 0

x₁ = 8

<u>x₂ = -4</u>

<u>The negative solution is -4</u>

3 0
2 years ago
Alana spent $18.24 on 4.8 pounds of plant food.
____ [38]

Answer: $3.8 per pound of food.

Step-by-step explanation: 18.24 divided by 4.8

4 0
2 years ago
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Which of the binomials below is a factor of this trinomial x^2+4x+4
dmitriy555 [2]
X² + 4x + 4
x            2
x             2

(x + 2) (x + 2) 


x + 2 should be your answer

binomial is having 2 terms

hope this helps
4 0
3 years ago
Read 2 more answers
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