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Rama09 [41]
3 years ago
12

Solve the equation 7x^2+21=0

Mathematics
1 answer:
Radda [10]3 years ago
6 0
Subtract 21 from both sides
7x^2=-21
Divide by seven on both sides
X^2=-3
Square root both sides

***X= square root of -3***
:)
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adell [148]

Answer:

$39

Step-by-step explanation:

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3 years ago
Suppose systolic blood pressure of 17 year female is approximately distributed with a mean of 118mmHg and a standard deviation o
Artemon [7]

Answer:

a) 0.383

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Step-by-step explanation:

a) Calculate each z-score.

z = (x − μ) / σ

z₁ = (112 − 118) / 12 = -0.5

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Use a calculator or z-score table to find the probability.

P(-0.5 < Z < 0.5) = 0.6915 − 0.3085 = 0.383

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3 years ago
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S_A_V [24]

9514 1404 393

Answer:

  16 miles

Step-by-step explanation:

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  Sin = Opposite/Hypotenuse

  Hypotenuse = Opposite/Sin

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4 0
3 years ago
Could someone please help me with this answer thank you
barxatty [35]
Y’all up for the time of your time
8 0
3 years ago
Find the volume of a cylinder that has a diameter of 12 in. and a height of 15 in
daser333 [38]

Answer:

<h3>\sf{ \boxed{ \bold{1697.14}}}</h3>

Step-by-step explanation:

Given,

diameter ( d ) = 12 in

height ( h ) = 15 in

<u>finding </u><u>the </u><u>radius </u><u>of </u><u>a </u><u>cylinder</u>

Radius is just half of diameter.

Radius ( r ) = 12 / 2 = 6 in

<u>finding </u><u>the </u><u>volume </u><u>of </u><u>a </u><u>cylinder </u><u>having </u><u>radius </u><u>of </u><u>6</u><u> </u><u>in </u><u>and </u><u>height </u><u>of </u><u>1</u><u>5</u><u> </u><u>in</u>

Volume of a cylinder = <u>\sf{\pi  \:  {r}^{2} h}</u>

⇒\sf{ \frac{22}{7}  \times  {6}^{2}  \times 15}

⇒\sf{ \frac{22}{7}  \times  36 \times 15}

⇒<u>\sf{1697.14} \: in</u>

Hope I helped!

Best regards!!

6 0
3 years ago
Read 2 more answers
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