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3 years ago

Can someone please help me on this??

Mathematics

1 answer:

Usimov [2.4K]3 years ago

3 0

Answer:

Step-by-step explanation:

To solve this use the equation $x^2 -15x - 50 = y$ given in the problem and the value y = 50. Substitute y = 50 then solve for x by factoring.

$x^2 -15x - 50 = 50\\x^2 - 15x -100 = 0$

Find two numbers which multiply to -100 and also add to -15. The numbers are -20 and 5.

So the factored form is (x-20)(x+5) = 0.

Set each factor equal to 0 and solve.

(x-20) = 0 so x = 20.

(x+5)=0 so x = -5.

This means the temperature is 20 degrees C or -5 degrees C. Only 20 is an option. The solutions is C.

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In how many ways can a photographer at a wedding arrange six people in a row, including the bride and groom, if a) the bride mus

ELEN [110]

Answer: a) 240, b) 480, c) 360

Step-by-step explanation:

Since we have given that

Number of people = 6

Number of bride and groom = 2

So, remaining people = 6-2 = 4

So, using the fundamental theorem of counting

remaining people can be arranged in

$4!=4\times 3\times 2\times 1=24$

Since bride has 5 positions to stand and grooms too has 5 positions to stand.

so, Number of positions for both bride and groom = 5+5=10

So, a) the bride must be next to the groom?

Number of ways = $24\times 10=240$

b) the bride is not next to the groom?

Total number of ways would be

$6!=6\times 5\times 4\times 3\times 2=720$

So, Number of ways that the bride is not next to the groom is

$720-240=480$

c) the bride is positioned somewhere to the left of the groom?

If Groom is in second position, bride has 1 ways to stand

If Groom is in third position , bride has 2 ways to stand

If Groom is in fourth position, bride has 3 ways to stand

If Groom is in fifth position, bride has 4 ways to stand

If Groom is in sixth position, bride has 5 ways to stand.

So, Number of ways to stand = 1+2+3+4+5=15

So, the total number of ways bride is positioned somewhere to the left of the groom is given by

$24\times 15=360$

Hence, a) 240, b) 480, c) 360

5 0

4 years ago

8 1/5 ( 4 2/5 + 3 3/10) What is the answer

steposvetlana [31]

8 1/5 ( 4 2/5 + 3 3/10)
= 8 1/5 ( 4 4/10 + 3 3/10)
= 8 1/5 * 7 7/10
= 41/5 * 77/10
= 3157/ 50
= 63 7/50

3 0

4 years ago

Read 2 more answers

Can someone help me plzz??

Hoochie [10]

Before=12/15 after=15/16

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4 years ago

Which number can not be used to write related number sentences? explain. 5 7 9 14

Veseljchak [2.6K]

The number 7 cannot be used to write related number sentences because it wouldn't fit into the equation & make it true.
9 + 5 = 14
5 + 9 = 14
14 - 5 = 9
14 - 9 =5
Nowhere in any of these equations can the #7 go in, & make these number sentences true.
Hope this helps & makes sense ! (:

4 0

3 years ago

Given that x+y=60, the maximum value of x2y is

jasenka [17]

Answer:

y3 - 120 y2 + 3600 y.

Step-by-step explanation:

Rearrange like terms to the same side of the equation:x2 yx = 60 - ySubstitute:60 - y2 yExpand the e.

hope this helps.

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3 years ago