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3 years ago

Please help and explain ANSWER ASAP!!!!

Mathematics

1 answer:

Setler79 [48]3 years ago

5 0

The fish is 2.25 ft above the water surface.

Step-by-step explanation:

Step 1: Given expression for height of the fish above the water surface, y = -16x² + 12x where x is time in seconds. Find height after 0.375 seconds

⇒ y = -16(0.375)² + 12 × 0.375 = -2.25 + 4.5 = 2.25 ft

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An amphitheater has 22 seats in the first row, 26 in the second, 30 in the third, and so on, for 30 rows. How many seats are in

Rama09 [41]

Answer:156 seats.

Step-by-step explanation:So you need to do is keep adding

4 to 30 27times. Then you add 22 and 26 to the sum.

6 0

4 years ago

Read 2 more answers

What are the zeroes of f(x) = x2 − 9x + 20?

OLEGan [10]

First, factor the polynomial. Then, set each binary answer to zero and solve. Those are the values of x where the graph either crosses or touches the graph.
x²-9x+20
(x-5)(x-4)

x-5=0 | x=5
x-4=0 | x=4

The zeros are 4 and 5

8 0

3 years ago

Let Z be a standard normal variable. Find the value of z if z satisfies P(Z > z) = 0.6331.

alisha [4.7K]

Answer:

$z = -0.340$

Step-by-step explanation:

We are given that Z is a standard normal variable.

We have to find the value of z such that

P(Z > z) = 0.6331

$P( Z > z)=0.6331$

$= 1 -P( Z \leq z)=0.6331$

$=P( Z \leq z)=1 - 0.6331 = 0.3669$

Calculation the value from standard normal z table, we have,

$P(z \leq -0.340) = 0.3669$

Thus,

$z = -0.340$

4 0

3 years ago

Which graph represents the solution set of the inequality x+2

timama [110]

Answer:

The left one...

Step-by-step explanation:

I just jocking. You can't ask questions like this without a photo or at lease explain what is on the photo.

3 0

3 years ago

How do you start this and find the weight of each shape? I do not remember doing this in class.

suter [353]

Let's say make the shapes, some variable name

say

⛁ ⚪ ◽ ▯
a b c d

so.. if take those are the shapes provided

then we can take a look at the first set and we can say that

2a + b + c = 20

a + 4d + b = 19

a + c = 9

3c + d + a = 19

thus $\bf \begin{cases}
2a + b + c = 20\\
a + 4d + b = 19\\
a + c = 9\\
3c + d + a = 19 
\end{cases}\\\\
-----------------------------\\\\
a+c=9\implies \boxed{c}=9-a\qquad thus
\\\\\\
2a+b+\boxed{9-a}=20\implies \underline{b}=11-a\impliedby thus
\\\\\\
a+4d+\underline{11-a}=19\implies d=\cfrac{8}{4}\implies d=2\\\\
-----------------------------\\\\
then\qquad 3\left(\boxed{9-a } \right)+\boxed{2}+a=19\implies 27-3a+2+a=19
\\\\\\
10=2a\implies 5=a$

and surely you can find the other two

4 0

3 years ago