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Nikolay [14]
3 years ago
7

Please help me this is a Math 3 post test really important last day of the quarter

Mathematics
1 answer:
jenyasd209 [6]3 years ago
7 0

Answer:

230

Step-by-step explanation:

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Show by substitution whether the number r is a solution of the corresponding quadratic equation.
Stels [109]

Answer:

It's choice B.

Step-by-step explanation:

When r= -11,

x^2 + 8x - 33 =  (-11)^2 - 88 - 33

= 121 - 88 - 33

= 0

- so x = -11 gives a zero value and is a solution to the equation.

3 0
2 years ago
Solve by Elimination:<br> 8x + 6y = -5<br> 10x + 6y= -13
jonny [76]

Answer:

x= -4 and y= 27/6

Step-by-step explanation:

-(8x + 6y = -5) which converts to -8x -6y = 5

10x + 6y = -13

simplify from there

-8x + 10x = 2x ; -6y + 6y = 0 ; 5 - 13 = -8

soo, now you have

2x = -8

x = -4

then, plug in to find y

8(-4) + 6y = -5

-32 + 6y = -5   add 32 on both sides

6y = 27    divide both sides by 6

y= 27/6 or 4.5

8 0
3 years ago
What is the factor of 15 and 35​
Ket [755]

Answer: 5 is the GCF

Step-by-step explanation: It just is

4 0
3 years ago
Read 2 more answers
Which of these points does not change its location when it is reflected across the y-axis? (2, 0) (0, 6) (3, 3) (–5, 5)
Anna [14]

Answer:

-5,5

Step-by-step explanation:

5 0
4 years ago
Okay I’m good at right triangles and Pythagorean theorem but I don’t know about is one please help
Bess [88]

Answer:

x=2

Step-by-step explanation:

When you sub in these values for the pythagorean theorem you get 1.5^2+x^2=2.5^2

2.25+x^2=6.25

4=x^2

x=2

8 0
3 years ago
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