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torisob [31]
2 years ago
5

Evaluate the expression when a=-15 and b=-5. b^2 / a + 5​

Mathematics
1 answer:
DENIUS [597]2 years ago
3 0
Answer: 20/3

Solution:

-5^2/-15 + 5
Determine the sign

5^2/15 + 5
Calculate

25/15 + 5
Simplify

5/3 + 5
Transform the expression

5 + 15/3
Calculate

= 20/3

(But there’s alternative forms too!: 6.6, 6 2/3)
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PSYCHO15rus [73]

the large bag is 5/6 lb, the smaller bags will be 1/3 lb, so it should be 5/6 ÷ 1/3

\bf \cfrac{5}{6}\div \cfrac{1}{3}\implies \cfrac{5}{\underset{2}{~~\begin{matrix} 6 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}\cdot \cfrac{~~\begin{matrix} 3 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}{1}\implies \cfrac{5}{2}\implies 2\frac{1}{2}

5 0
3 years ago
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Find measure of Arc BC
iren2701 [21]

Answer:

arc BC = 140

Step-by-step explanation:

Comment

Pick a point inside the circle. It should look like this point is the center of the circle. Call this point D. Draw lines CD and BD

CD makes a right angle with AC

BD makes a right angle with AB

The central angle formed by The given information above is

<BDC = 360 - 90 - 90 - 40

<BDC = 140.

Answer The arc measurement of BC = 140

5 0
2 years ago
ATM personal identification number (PIN) codes typically consist of four-digit sequences of numbers. Find the probability that i
oksian1 [2.3K]

Answer:

(a) 0.0001 or 0.01%

(b) 0.01 or 1%

Step-by-step explanation:

Since there are 10 possible numeric digits (from 0 to 9), and there is only one correct digit, there is a 1 in 10 change of getting each digit right.

The probability that if you forget your PIN, then you can guess the correct sequence

(a) at random:

P=(\frac{1}{10})^4=0.0001=0.01\%

(b) when you recall the first two digits.

P=(\frac{1}{10})^2=0.01=1\%

7 0
3 years ago
PLZ HELP!!!! 20 POINTS!!<br> What is the value of x?
vazorg [7]

Answer:

25

Step-by-step explanation:

X² = 7² + 24²

X² = 49 + 576

X² = 625

X = 25

4 0
3 years ago
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What is the function for the arithmetic sequence 2,7,12,17,22
Deffense [45]


The common difference, d, is 5 and the starting value, a, is 2.
Filling this in the form of x_n=a+d(n-1)

<span>you get

</span>x_n = 2+5(n-1)
3 0
3 years ago
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