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3 years ago

Given this number line, CA = ?

Mathematics

2 answers:

Anni [7]3 years ago

4 0

Answer:

Step-by-step explanation:

subtract 11-4=7

Flauer [41]3 years ago

3 0

I think its 7 cuz the amount of space apart

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Which equation represents y= -x^2 + 6x + 7 in vertex form ?

Drupady [299]

we are given

$y= -x^2 + 6x + 7$

we can use vertex form parabola formula

$y= a(x-h)^2+k$

so, we can complete x square

$y= -(x^2 - 6x - 7)$

$y= -(x^2 - 6x - 7+3^2-3^2)$

$y= -(x^2 - 6x +3^2-16)$

$y= -(x-3)^2+16$

so, option-A........................Answer

7 0

2 years ago

What is sn for the arithmetic series with a1=3 an=-38 and n=8?

otez555 [7]

Sn = n/2 (a1+an)
= 8/2 (3-38)
= 4 (-35)
= -140

4 0

3 years ago

Make r the subject of the formula

zloy xaker [14]

Answer:

$r=\frac{-a+p}{a+p}$

Step-by-step explanation:

$-pr+p=ar+a$

$-ar-pr+p=a$

$-ar-pr=a-p$

$r(-a-p)=a-p$

$r=\frac{-a+p}{a+p}$

3 0

2 years ago

Read 2 more answers

Helpp need this done ASAP

lorasvet [3.4K]

Number two is proportional just do Y over X y/x meaning divided all the y’s over the x’s so 25 divided by 5 30 divided by 6 35/7 40/8 they all equal 5 so it’s proportional
number three isn’t proportional when you do y/x they all come out differently so you do y2-y1 over x2-x1 16-4/4-2 16-4=12 4-2=2 then you divided 12/2 that equals 6 you do that again but with the next numbers but they don’t equal so it’s no equation no constant

7 0

1 year ago

In a shipment of 22 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 4 smartphones, of

Eddi Din [679]

Answer:

Therefore the required ways are =190

Step-by-step explanation:

Combination: Combination is the number of selection of items from a collection of items where the order of selection does not matter.

Total number of smartphones =22

Defective phone = 2

Non defective phone = (22-2) =20

The control inspector randomly test 4 smartphones of which 2 are defective.

Non defective phone = 2

The ways to select 2 non defective phone is

$^{20}C_2=\frac{20!}{2!(20-2)!} =\frac{20!}{2!18!}=\frac{19\times 20}{2} =190$

The ways to select 2 defective phone is= $^2C_2=1$

Therefore the required ways are = (190×1) =190

5 0

3 years ago