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Aleonysh [2.5K]
3 years ago
8

Tj Ate 100 time on the slide and breelyn slide down 20 time and marlin slide down1 Time how many slide did to and breelyn and ma

rine went down 100 + 20 =120
Mathematics
1 answer:
Ray Of Light [21]3 years ago
3 0

Answer:

120

Step-by-step explanation:

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Explain why -4 is greater than -10 even though 4 is less than 10
Korvikt [17]
-4 is greater than - 10 because -4 is closer to 0 than -10 is
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3 years ago
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5) Solve 5 - 2x &lt; 7.<br> A) x &lt; -1<br> B) x&gt;-1<br> 0x&lt;-12<br> D) X &gt; -12
Bingel [31]

Answer:

i think B. x>-1 is answer

Step-by-step explanation:

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2 years ago
On a 10-item test, three students in Professor Hsin's advanced chemistry seminar received scores of 2, 5, and 8, respectively. F
Inessa [10]

Answer:

For this distribution of test scores, the standard deviation is equal to the square root of 9

D) 9

Step-by-step explanation:

We need to know the standard deviation formula:

S=\sqrt{\frac{sum(x-Am)^2}{n-1} } (1)

Where:

S: Standard deviation

sum: Summation

x: Sample values

Am: Arithmetic mean

n:   Number of terms, in this case 3

Now, we need to know the arithmetic mean of the sample values: 2, 5 and 8

Am=\frac{2+5+8}{3} = 5

To know the standard deviation we need to have the summation of each term minus the arithmetic mean squared.

(x-Am)^2 of each term:

(2-5)^2=9\\(5-5)^2=0\\(8-5)^2=9

Now, we can find the standard deviation:

S=\sqrt{\frac{9+0+9}{3-1} } \\S=\sqrt{\frac{18}{2} } \\S=\sqrt{9}

The standard deviation is equal to the square root of 9

4 0
3 years ago
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Please helpppppppppppp
morpeh [17]

Answer:

7.7 km

Explanation:

Use cosine rule as here given two sides and one angle.

Cosine rule states:

a² = b² + c² - 2bc cos(A)

While solving, treat a = 7.5 km as to that opposite angle is given of 68°

then b = missing side, c = 5.2 km, A = 68°

Applying rule:

7.5² = b² + 5.2² - 2(b)(5.2) cos(68)

56.25 = b² + 27.04 - 3.8959b

56.25 - 27.04 = b² - 3.8959b

b² - 3.8959b = 29.21

b² - 3.8959b - 29.21 = 0

apply quadratic equation, Here [a = 1, b = - 3.8959, c = -29.21]

\sf b = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \quad\:when \:\ ax^2 + bx + c = 0

\sf b = \dfrac{ -(-3.8959) \pm \sqrt{(-3.8959)^2 - 4(1)(-29.21)}}{2(1)}

\sf b = 7.69 291 \quad or \quad b = -3.797

\sf b = 7.7 \quad (rounded \ to \ nearest \ tenth)

As length cannot be negative. Hence the value of b is only 7.7 km

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2 years ago
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A company orders 6 boxed lunches from a deli for $41.40. If each boxed lunch costs the same amount, what is the unit cost of eac
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Answer:

248.40

Step-by-step explanation:

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