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d1i1m1o1n [39]
3 years ago
7

I WILL AWARD BRAINLIEST!! PLEASE HELP!!!! SOLVE EACH!!!

Mathematics
1 answer:
Jlenok [28]3 years ago
4 0

Answer:

A. -\frac{9}{4}\le \:m\le \frac{9}{4}

B. -\frac{58}{5}

C. k or k>7

Step-by-step explanation:

\left|\frac{m+3m}{3}\right|-1\le \:2

\left|\frac{m+3m}{3}\right|\le \:3

-3\le \frac{m+3m}{3}\le \:3

m\ge \:-\frac{9}{4}

m\le \frac{9}{4}

-\frac{9}{4}\le \:m\le \frac{9}{4}

____________________

\left|\frac{5z-6}{8}\right|

-8

z>-\frac{58}{5}

z

-\frac{58}{5}

____________________

5

\left|\frac{3k-1}{4}\right|>5

k

k>7

k

k>7

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One electrician charges his customers a $60 service fee plus $35 per hour.
gavmur [86]

Answer:

2 hours; $130

Step-by-step explanation:

We can do this by setting up an equality since we are finding when they are the same. Say x is the number of horus:

65 * x = 60 + 35* x

30 * x = 60

x = 2 hours

The cost will be the same at two hours, and plugging it in, we can get 65*2=130.

5 0
2 years ago
In a school library, there are 780 books of English and 364 books of Science. Ms. Yakang, the librarian of the school wants to s
V125BC [204]

Answer:

Step-by-step explanation:

you have 1144 books but without knowing how many rows there  are i cant help you find the minimum number.

but all you have to do is take the number of the books all together (1144)

then divide that number by how many rows or shelf there are

7 0
4 years ago
Which set of ordered pairs represents a function? Group of answer choices
WITCHER [35]

Answer:

{(–4, 4), (–2, 4), (1, 4), (5, 4)}

plz give brainlist

Step-by-step explanation:

it is the only one where each input has a unique output

6 0
3 years ago
Jane spent 3 hours exploring a mountain with a dirt bike. First, she rode 55 miles uphill. After she reached the peak she rode f
Neko [114]

Answer:

Her speed on the summit was 35 mph.

Step-by-step explanation:

Her speed on the summit was "x" mph while her speed while climbing was "x - 10" mph. The distance she rode uphill was 55 miles and on the summit it was 28 miles. The total time she explored the mountain was 3 hours. Therefore:

time uphill = distance uphill / speed uphill = 55 / (x - 10)

time summit = distance summit / speed summit = 28 / x

total time = time uphill + time summit

3 = [55 / (x - 10)] + 28 / x

3 = [55*x + 28*(x - 10)]/[x*(x - 10)]

3*x*(x - 10) = 55*x + 28*x - 280

3x² - 30*x = 83*x - 280

3x²  - 113*x + 280 = 0

x1 = {-(-113) + sqrt[(-113)² - 4*(3)*(280)]}/(2*3) = 35 mph

x2 = {-(-113) - sqrt[(-113)² - 4*(3)*(280)]}/(2*3) = 2.67 mph

Since her speed on the uphill couldn't be negative the speed on the summit can only be 35 mph.

6 0
3 years ago
What is the solution to the system of equations below?
kifflom [539]

Answer:

(-5,-14)

Step-by-step explanation:

To find the solution of the system of two equations

\left\{\begin{array}{l}y=4x+6\\y=2x-4\end{array}\right.

equate right sides of these two equations:

4x+6=2x-4

Rewrite terms with x into the left side and without x into the right side:

4x-2x=-4-6\\ \\2x=-10\ [\text{divide by 2}]\\ \\x=-5

Substitute x=-5 into the first equation:

y=4\cdot (-5)+6=-20+6=-14

The solution is (-5,-14)

4 0
3 years ago
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