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3 years ago

5+7k>=-30 and -4k +4>20

Mathematics

1 answer:

Slav-nsk [51]3 years ago

7 0

Answer:

$\large\boxed{-5\leq k$

Step-by-step explanation:

$5+7k\geq-30\ \wedge\ -4k+4>20\\\\5+7k\geq-30\qquad\text{subtract 5 from both sides}\\7k\geq-35\qquad\text{divide both sides by 7}\\\boxed{k\geq-5}\\\\-4k+4>20\qquad\text{subtract 4 from both sides}\\-4k>16\qquad\text{change the signs}\\4k$

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7th Grade Math Please help -7 = 1/3 a Find the value of a

julsineya [31]

Answer:

$\huge\boxed{a=-21}$

Step-by-step explanation:

$-7=\dfrac{1}{3}a\to\dfrac{1}{3}a=-7\qquad|\text{multiply both sides by 3}\\\\3\!\!\!\!\diagup\cdot\dfrac{1}{3\!\!\!\!\diagup}a=(-7)(3)\\\\a=-21$

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3 years ago

Jose worked n hours at 8.75 dollars per hour he made a total of $61.25 write an expression that represents the total number of h

Nitella [24]

Answer:

n = P/8.75

Step-by-step explanation:

Jose’s pay (P) depends on the number (n) of hours he works.

P = 8.75n Divide both sides by 8.75

n = P/8.75

=====

P = $61.25

n = 61.25/8.75

n = 7 h

Jose worked for 7 h.

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3 years ago

1/8 x 8 3/8 x 8 1/8 x 8 3/8 x 8

aivan3 [116]

Step-by-step explanation:

1/8 x 8 = 1

3/8 x 8 = 3

1/8 x 8 = 1

3/8 x 8 = 3

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3 years ago

5) Out of a group of 40 students, 14 are taking English, 29 are taking Chemistry, and 5 are

Lostsunrise [7]

a. Venn diagram attached below.

b. 2 students are in neither English nor Chemistry.

c. The probability that a randomly chosen student is only taking chemistry is 24/40, or 6/10 because out of the 40 students, 24 of them take exclusively the chemistry class.

Download pdf

3 0

3 years ago

Aisha can walk 9 miles in 2 hours. At this rate, how many miles will she walk during the week if she walks a total of 6 hours?

Nikolay [14]

Answer: Aisha can walk 27 miles during the week if she walks a total of 6 hours.

Step-by-step explanation:

9/2=4.5

4.5*6=27

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3 years ago

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