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3 years ago

What is the value of the expression below when z=9? z^2 +9z+10

Mathematics

1 answer:

viva [34]3 years ago

7 0

Answer:

Step-by-step explanation:

1) Substitute (replace) every z with 9

$(9)^2+9(9)+10$

2) Solve

$(9)^2+9(9)+10\\81+9(9)+10\\81+81+10=172$

(Extra Breakdown Below)

1) Calculate Exponents (9)^2 = 81

2) Multiply 9(9) = 81

3) Add 81+81+81 = 172

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3 years ago

I promise I will mark as brainiest if a speed of a car increase its average speed in a journey of 200 miles by 5 mile/hour the j

jok3333 [9.3K]

Answer:

$\large \boxed{\sf \ \ \ \dfrac{\sqrt{4025}-5}{2}=29.22144... \ \ \ }$

Step-by-step explanation:

Hello

<u>Let's note the original speed of the car v</u>

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$\boxed{\sf \ \ \dfrac{200}{v+5}=\dfrac{200}{v}-1 \ \ }$

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Only one is positive and this is is

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Hope this helps.

Do not hesitate if you need further explanation.

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Answer:

Step-by-step explanation:

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