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2 years ago

Using the x,y format where does the graph of 3x+3 and -5×+7 intersect

Mathematics

2 answers:

IRINA_888 [86]2 years ago

8 0

Not sure if I'm right but I believe they intersect at (1,4).

denis-greek [22]2 years ago

5 0

Assuming they equal y

y=3x+3
y=-5x+7
set eqal to each other since both equal y
3x+3=-5x+7
add 5x both sides
8x+3=7
minus 3 both sides
8x=4
divide by 8 both sides
x=1/2
sub back

3x+3=y
3(1/2)+3=y
1.5+3=y
4.5=y
9/2=y

x=1/2
y=9/2
(1/2,9/2) is soltuion

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If two lines are perpendicular to each other, do they lie in the same plane?

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Yes they do, Hope this helps :p

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2 years ago

Use Gauss's approach to find the following sums (do not use formulas). 1+3+5+7+...999

muminat

$S=1+3+5+\cdots+995+997+999$
$S=999+997+995+\cdots+5+3+1$
$\implies 2S=(1+999)+(3+997)+(5+995)+\cdots+(995+5)+(997+3)+(999+1)$

$2S=\underbrace{1000+1000+\cdots+1000+1000}_{500\text{ times}}$

(We are adding 500 instances of 1000 because that's how many odd numbers there are between 1 and 1000, inclusive.)

$2S=500\times1000=500000$
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3 years ago

A) -10 < y < 10 B) -2 < y < 7 C) { -2, 1, 4, 7 } D) { -2, 7 }

nekit [7.7K]

The answer to this should be b

7 0

2 years ago

Will make brainliest if answered correctly

Komok [63]

Answer:

i think the answer is (B)

Step-by-step explanation:

The y value of a point where a vertical line intersects a graph represents an output for that input x value. If we can draw any vertical line that intersects a graph more than once, then the graph does not define a function because that x value has more than one output.

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2 years ago

Read 2 more answers

Please help me with 11-16 please! Thank you

sasho [114]

11. -1

12. -9

13. 32

14. -15

15. 10

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2 years ago