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lions [1.4K]
2 years ago
13

What is the temperature change if it was -2°C midnight and then the next day the temperature had risen to 9°C

Mathematics
1 answer:
Vlad1618 [11]2 years ago
4 0
The answer to your math problem is 11
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Could someone do all the problems and/or check my work?
MArishka [77]
11. You’ve done it correctly

12. Let x^2=y
y^2+13y+40=0
(y+8)(y+5)=0
y=8, 5
Since y=x^2
x^2=8 x^2=5
x=+/-√5 x= +/-2√2

13. x^4-x^2-x^2-8=0
x^4-2x^2-8=0
let x^2=y
Y^2-2y-8=0
(y-4)(y+2)=0
y=4, -2
Since y=x^2
X^2=4 X^2=-2
X= +/- 2 This wouldn’t be a real solution

14. It’s pretty much the same process, just substitute y in for x^2. If you’re confused feel free to ask and I can do it, or you can put it through Photomath

15. You’re on the right track so I’m just going to continue from where you left off
x^2(4x+5)-4(x+5)=0
(x^2-4)(4x+5)=0
x= +/- 2 4x=5
x=5/4 or 1 1/4

Hope this helped :)
8 0
3 years ago
Read 2 more answers
What is the solution to this polynomial equation? x3 + 2x2 - 4x - 8 = 0
Naddik [55]

x3 + 2x2 - 4x - 8 = 3x-8

3 0
3 years ago
A coral reef grows 0.15 m every week. How much does it grow in 11 weeks?
Misha Larkins [42]
Coral reef = 0.15x
0.15(11) = 1.65
1 meter = 100 cm
1.65 * 100 = 165

Solution: 165 cm
3 0
2 years ago
Sassy jeans are $90 a pair. If they are 40% off today, how much will they cost?
Slav-nsk [51]
They will cost $54 
i know this because if youre getting 40% off, you will have to pay 60% of the total cost
so, 90 x .60 = 54
let me know if you have any further questions
:)
7 0
3 years ago
Read 2 more answers
find the first and second differences of y values to determine if the table will derive to a quadratic function
Nadya [2.5K]

Answer:

Step-by-step explanation:

Term Definition

Linear regression line The line that goes through a set of points either exactly or approximately.

Difference The result of a subtraction operation is called a difference.

3 0
2 years ago
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