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Sphinxa [80]
3 years ago
7

I got to hurry so i kinda didnt have time

Mathematics
1 answer:
k0ka [10]3 years ago
5 0

Answer:

b

Step-by-step explanation:

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What value of $k$ will make $4x^2 - 20x + k$ the square of a binomial?
Arisa [49]

Answer:

k = 25

Step-by-step explanation:

(2x  - sqrt(k) )^2              Expand this as a binomial                          

4x^2 - 4x*sqrt(k) + k      The middle term must be -20x Solve for k so it is

-4xsqrt(k) = - 20x            Divide by -4x

sqrt(k) = -20x/-4x             Do the division

sqrt(k) = 5                         Square both sides

k = 25


5 0
3 years ago
Please help and explain how you solved it. Thanks.
galina1969 [7]

Answer:

This is 0.14 to the nearest hundredth

Step-by-step explanation:

Firstly we list the parameters;

Drive to school = 40

Take the bus = 50

Walk = 10

Sophomore = 30

Junior = 35

Senior = 35

Total number of students in sample is 100

Let W be the event that a student walked to school

So P(w) = 10/100 = 0.1

Let S be the event that a student is a senior

P(S) = 35/100 = 0.35

The probability we want to calculate can be said to be;

Probability that a student walked to school given that he is a senior

This can be represented and calculated as follows;

P( w| s) = P( w n s) / P(s)

w n s is the probability that a student walked to school and he is a senior

We need to know the number of seniors who walked to school

From the table, this is 5/100 = 0.05

So the Conditional probability is as follows;

P(W | S ) = 0.05/0.35 = 0.1429

To the nearest hundredth, that is 0.14

3 0
3 years ago
WORTH ALOT!!! 25) A hockey player signs a contract with a starting salary of $840,000 per year and an annual increase of 6.5% be
Oduvanchick [21]

the answer is A I hope this helps

6 0
3 years ago
A cuboid measures 21 cm by 14cm by 9cm Find it’s volume
crimeas [40]

Answer:

2646~cm^{3}

Step-by-step explanation:

There isn't really much to do here. To find the volume we multiply the three sides, which are already given to us (21, 14, 9) and just like that, we will get the volume of our cuboid.

Hope it helped,

BiologiaMagister

3 0
3 years ago
Read 2 more answers
Ever since Renata moved to her new home, she's been keeping track of the height of the tree outside her window.
vekshin1

Answer:

33 cm/year

Step-by-step explanation:

H = 33t + 210

Slope= 33

Slope is also the rate or change:

Growth rate: 33 cm per year

6 0
3 years ago
Read 2 more answers
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