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max2010maxim [7]
3 years ago
5

20. Find the value of the variable y in the equation –5.7 + y = 8.2. A. –2.5 B. 2.5 C. –13.9 D. 13.9

Mathematics
1 answer:
Elena L [17]3 years ago
8 0

-5.7+y=8.2\qquad\text{add 5.7 to both sides}\\\\\boxed{y=13.9}\to\boxed{D.}

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Which radical expressions are equivalent to the exponential expression below ? Check all that apply . (13 + 8) ^ (1/2) A. (13 +
Fantom [35]

Answer:

(B)\sqrt{21}\\(C)\sqrt{13+8}

Step-by-step explanation:

Given the expression (13 + 8) ^{1/2}

Using law of indices: a^{1/2}=\sqrt{a}

(13 + 8) ^{1/2}=\sqrt{13+8}

Also:13+8=21

Therefore:

(13 + 8) ^{1/2}=21^{1/2}\\=\sqrt{21}

8 0
4 years ago
- 2/5(20x -15) can you plz help me
Alex17521 [72]

Answer:

Step-by-step explanation:

First I just made -2/5 into a decimal because I like to work with decimals better (which equals -.4)

Then I times everything separately in the parenthesis and got -8x+6

Next you move the 6 over to the left side of the equals sign which would make the equation be -6 = -8x

Lastly you divide the -8 from -6 and you get X = 3/4

7 0
3 years ago
Read 2 more answers
Solve. Dante's mom made 2 liters of cocoa. Dante and his 7 friends each drank a serving of cocoa. If each serving is 235 millili
blsea [12.9K]

Answer:

120 millimeters or 0.12 liters

Step-by-step explanation:

To solve this question :

  1. we have to convert liters to millimeters
  2. multiply the serving of coca by the number of people that consumed the coca
  3. subtract the answer gotten from the step above from 2 litters

1 liter = 1000 millimeter

2 liters = 2 x 1000 = 2000mm

8 people drank cocoa = 8 x 235 = 1880mm

Amount of cocoa left over = 2000 - 1880 = 120mm or 0.12 liters

5 0
3 years ago
5. Aaron sold 126 boxes of cookies. This is 14 more than twice the
qaws [65]

Answer:

112

Step-by-step explanation:

Aaron = y

Victoria = x

y = 14 +x

126 = 14 + x

x = 112

Victoria sold 112 boxes of cookies

6 0
2 years ago
The slope of a line is 1, and the y-intercept is -1. What is the equation of the line written in slope-intercept form?
Scilla [17]
The slope-intercept form is:
y = mx + b
where m = slope, and b = y-intercept.
You need a slope of 1, so m = 1.
You need a y-intercept of -1, so b = -1.
Replace m with 1 and b with -1 in the slope intercept form to get

y = 1x + (-1)

which simplifies to

y = x - 1
3 0
3 years ago
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