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Romashka [77]
3 years ago
10

Use the quadratic formula to solve 2x^2 -1 = 7x, and then verify your answer by graphing​

Mathematics
2 answers:
Bingel [31]3 years ago
8 0

Answer:

D

Step-by-step explanation:

Edge 2021

Nimfa-mama [501]3 years ago
7 0

Answer:

7+- root 57 / 4

d. 7+root 57/4 , 7-root 57/4 on edg

Step-by-step explanation:

got it right :)

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mylen [45]
D 66 cats

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7 0
3 years ago
Which number is an irrational number?Help Plzzzzz​
Aleonysh [2.5K]

The square root of 15 is irrational.

6 0
3 years ago
Read 2 more answers
Cassie has test grades of 71, 78 and 83 on the first three tests in her
Neporo4naja [7]

Answer:

x ≥ 88

Step-by-step explanation:

In order to have at least an average of 80 after 4 tests, the sum of her scores must be at least 80 * 4 = 320 so we can write the following inequality:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

x ≥ 88

3 0
3 years ago
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PLs help me ASAP I DONT have time to answer this question, pls show proof on why it’s that answer, it also detects if it’s right
kumpel [21]
<h2><u>15 feet</u> is the correct answer!</h2><h2></h2><h3>6 ÷ 2 = 3</h3><h3><em>h</em> ÷ 5 = 3</h3><h3>3 x 5 = 15</h3><h3 /><h3><em>Please let me know if I am wrong.</em></h3><h3 />
7 0
2 years ago
1 hour = 3600 seconds and 1 mole = 5,280 feet. Make a conjecture about how you could convert a speed of 15 miles per hour to fee
Keith_Richards [23]
We know that speed (rate) is equal to distance over time.

The current unit of distance is miles, and we want to convert it to feet. The unit of time is hours, and we want seconds. In order to do this, we need to create a conversion factor.

Since 1 \ mi = 5,280 \ ft and 1 \ hr = 3,600 \ s, we will use these are our conversion factors.

The goal in a dimensional analysis problem like this is for your units to work out. Remember, we want feet per second.

We write speed =  \dfrac{15 \ mi}{hr} *  \dfrac{5,280 \ ft}{1 \ mi} *  \dfrac{1 \ hr}{3,600 \ s} \\  \\ speed =  \dfrac{22 \ ft}{s}.

You may wonder why in the conversion factor, we chose to put feet over miles and hours over seconds. This is again because we want our units to cancel. If you have one unit the numerator and the same one in the denominator, the units cancel out.

In sum, the answer is 22 ft/s.
3 0
3 years ago
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