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3 years ago

by what precent will a fraction increase if its numerator is decreased by 30% and its denomenator is decreased by 50%

Mathematics

1 answer:

natka813 [3]3 years ago

5 0

Answer:

this might be we wrong but 20

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Rosa can clean a house in 7 hours. When Rosa and Amy work together, they can clean a house in about 4.2 hours. About how long wi

Step2247 [10]

First we will calculate rate of work of rosa and amy.
work done by rosa in time t=t*1/7
Work done by Amy and rosa=t(1/7+1/4.2)

t/7+t/a=t/4.2
t=10.5 hr

Always keep remember those formula or logic below

Work rate × Time to finish the job = 1 job done

Work rate = (1 job done) / (Time to finish the job)

Time of doing the job = (1 job done) / (Work rate)

4 0

3 years ago

NEED ASAP WILL GIVE BRAINLIEST Write a real world problem that can be represented by the following inequality, 15X - 20 ≤ 130 ,a

ddd [48]

Answer:

I used my name, lol

Step-by-step explanation:

Kat wants to use her money to support animals at a shelter after receiving her pay check from work . She pays $15 per animal, and leaves $20 for the workers. She can spend at most $130. How many animals can she help?

Solve for x

$15x-20\leq 130$

Add 20 to both sides to isolate x

$15x-20+20\leq 130+20\\15x\leq 150$

Divide each side by 15

$\frac{15x}{15}\leq \frac{150}{15} \\\\x\leq 10$

Kat can help at most 10 animals.

(I am so sorry I took so long, I couldn't come up with anything.)

5 0

3 years ago

Help me plsssssssssssssssss

velikii [3]

Answer:

h=12

Step-by-step explanation:

by cross multiplying we get 1h=12 or h=12 so h=12

8 0

2 years ago

Sarah has 273 feet of wire to make bead necklaces. If each necklace requires 1 2/3 feet of wire, how many necklaces can she make

o-na [289]

Oh boy, here we go again

First we must convert 1 2/3 to an improper fraction. By doing this, we get 5/3 (3/3 + 2/3)

So now we have 273 / 5/3

To divide this easier we can do something that when I learned it was called (keep, change, flip) which basically means keep the first fraction, change the sign from division to multiplication, and flip the second fraction

This now turns into: 273/1 * 3/5

Combine 273 and 3/5

273⋅3/5

Multiply 273

by 3

819/5

is your answer

5 0

3 years ago

What is the slope of the line perpendicular to the given line?<br> 5x - 2y = 14

motikmotik

Answer:

$-\frac{2}{5}.$

Step-by-step explanation:

1) if to re-write the given equation into slope-interception form, then:

$y=\frac{5}{2}x-7;$

the slope of the given line is 5/2;

2) according to the rule of perpendicular, the required slope should be:

s*(5/2)=-1;

3) if to solve this equation (s*5/2=-1), then s=-2/5 or -0.4.

3 0

2 years ago