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3 years ago

6

Which pair of expressions are equivalent?

1 answer:

vova2212 [387]3 years ago

7 0

Answer: The first one

Step-by-step explanation:

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Solve the equation by completing the sqaure. if necessary round to the nearest hundreth x^2+4x=1

viktelen [127]

Answer:

x = ± √ 5 − 2

Step-by-step explanation:

5 0

3 years ago

Which is the graph of y = cos(x) + 3? On a coordinate plane, a cosine curve has a maximum of 3 and a minimum of negative 3. On a

Andrei [34K]

Answer: none of them is right, did you meant maximum 4 and minimum 2?

Step-by-step explanation: cos x gets values between 1 and -1.

If you add 3 you get values between 4 and 2.

8 0

2 years ago

Read 2 more answers

Find the values of x, y, and z.<br> X=?<br> Y=?<br> Z=?

astraxan [27]

I haven’t taken geometry in a couple years, so I hope this is right. I’m so sorry if it’s not!!

X= 91

Y= 62

Z= 45

4 0

2 years ago

Jeremy’s fruit stand sells peaches and watermelons. In the first hour the fruit stand is open, 12 bushels of peaches and 5 water

polet [3.4K]

We define the variables:
p: cost of bushel of peaches
w: cost of watermelon
We wrote the system of equations:
12p + 5w = 150
15p + 8w = 198
We can represent the system in matrix form as
Ax = b
Where,
A = [12 5; 15 8]
b = [150; 198]
x = [p; w]

3 0

3 years ago

Read 2 more answers

A ball is dropped from a height of 64 feet. Its height, in feet, can be modeled by the function h(t) = -167 + 64, where t is the

Oliga [24]

Answer:

Step-by-step explanation:

Known facts:

the ball dropped from a height of 64 feet
function $h(t) = -16t^{2} + 64$

First question:

the ball hits the ground when h(t) = 0, thus we get the equation

$-16t^{2} +64 = 0\\16t^{2} = 64\\t^{2} =4\\t = 2$

So the ball hits the ground in 2s

Second question

to find how long it takes the ball to fall 36 feet, we must set h(t) = 64 - 36 = 28

$-16t^{2} +64 = 28\\16t^{2} = 36\\t = \frac{6}{4} =1.5s$

So the ball hits the ground in 1.5s

Hope that helps!

3 0

2 years ago