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Tju [1.3M]
2 years ago
10

If z=15, what would the expression z2 – 2z + 15 be equal to?

Mathematics
2 answers:
svet-max [94.6K]2 years ago
5 0

Answer:

15

Step-by-step explanation:

z2 - 2z + 15

(15)2 - 2(15) + 15

30 - 30 + 15

0 + 15

15

kupik [55]2 years ago
4 0

Hey there!

z^2 - 2z + 15

= 15^2 - 2(15) + 15

= 225 - 30 + 15

= 195 + 15

= 210

Therefore, your answer is: 210

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

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Two triangular roofs are similar. The ratio of the corresponding sides of these roofs is 2:3. If the altitude of the smaller roo
schepotkina [342]

Answer:  6.75 feet

Step-by-step explanation:

Since, the ratio of the side of the similar triangle = 2 : 3

Thus, by the property of similar triangle,

The ratio of the altitudes of the triangle = 2 : 3

Let the altitude of smaller triangle = 2 x

And, the altitude of larger triangle = 3 x

Where x is any number.

According to the question,

2 x = 4.5

x = 2.25

Therefore, the altitude of larger triangle = 3 × 2.25 = 6.75 feet

5 0
3 years ago
Simple interest $1200 8% 2years
Gennadij [26K]

This is a screen shot of an online calculator called mathportal.com it shows the work used to find the answer to this question

Hope this helped and have an amazing day :)

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5 0
3 years ago
The burges are moving across the country .Mr burges leaves 3 hours before mrs.burges. If he averages 50 mph and she averages 70
kirill [66]

10.5 hours

let t be time then distance travelled by both is

Mr Burges ⇔ d = 50t ( distance = speed × time )

Mrs Burges ⇒ d = 70(t - 3)

At the point of overtaking both will have travelled the same distance

equating their distance and solving for t

70(t - 3) = 50t

70t - 210 = 50t ( subtract 50t from both sides )

20t - 210 = 0 ( add 210 to both sides )

20t = 210 ( divide both sides by 20 )

t = 10.5 hours


4 0
3 years ago
A photograph measuring 3 inches by 2.5 inches is to be enlarged so that the smaller side, when enlarged, will be 8 inches. How l
klasskru [66]
9.6 hope this helped :) 
4 0
3 years ago
How to find nth term of a sequence in math?
worty [1.4K]
Salutations!

To find the nth term, you will be needing a formula.

a +(n-1) *d

a stands for the first term (first number in the sequence)

d stands for the difference between two terms. (always remember to subtract from the 2nd term to the 1st term)

and the n is what we are going to find

so in your sequence: 5, 10, 15, 20

5 is a (as it is the first term)

d would be 5 ( 10 -5 =5)

a+(n-1)*d

5+ (n-1) *5

5+5n-5

5n+0

your nth term is 5n+0

Hope this helps!

Have a great day!
7 0
3 years ago
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