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Lorico [155]
3 years ago
8

If you take a number multiply by 7 then takeaway 1,You get the same as if you took the number multiply by 5 then takeaway 8. Wha

t is the number?
Mathematics
1 answer:
shusha [124]3 years ago
5 0

Answer:

x = -3.5

Step-by-step explanation:

First we create the equation.

Let x = the unknown number

7x-1 = 5x - 8

Add 8 to both sides

7x + 7 = 5x

Subtract 7x

7 = -2x

Divide by 2

-7/2 = x

-3.5 = x

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Dustin bought a dvd player that was markrd doen from 150 to 100 find the percent of decrease
cricket20 [7]
It was 150, went down to 100, so it went 50 bucks.

now, if we take 150 as the 100%, what is 50 off of it in percentage?

\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
150&100\\
50&p
\end{array}\implies \cfrac{150}{50}=\cfrac{100}{p}\implies p=\cfrac{50\cdot 100}{150}
4 0
3 years ago
I can't figure out the equivalent fraction. Whoever gets it first gets brainliest, and please do explaination
cupoosta [38]

Factorize the numerator and denominator. You'll see that they both have a factor of 4 that can be canceled. The introduce a factor of 3 to change the denominator to 36.

\dfrac{28}{48} = \dfrac{4\times7}{4\times12} = \dfrac7{12} = \dfrac{3\times7}{3\times12} = \boxed{\dfrac{21}{36}}

6 0
2 years ago
Can someone pls help me?
Ksivusya [100]

Answer:

1. x= -66

2,  x=7

3. m= -28

4. t= -2.04 (I rounded)

5. x-(-2)=21

6. x(-2.5-3)=60

7. x≥40

Step-by-step explanation:


4 0
4 years ago
A box contains 10 red , 3 blue, and 7 white balls , two balls are drawn at random from the box on after the other without replac
mestny [16]

Answer:

P(XX) = 69/190

Step-by-step explanation:

Given:

20 balls, 10R, 3B, 7W.

Two taken without replacement.

Find probability of two identical colours.

P(XX)

Solution:

We use the multiplication rule for the probability of each of the 2 draws

P(RR) = 10/20*9/19 = 90/380

P(BB) = 3/20*2/19 = 6/380

P(WW) = 7/20*6/19 = 42/380

Probability of drawing two identical coloured balls

P(XX) = (90+6+42)/380 = 138/380 = 69/190

4 0
3 years ago
Jeremy has two 7 foot long boards. He needs to cut pieces that are 15 inches long from the boards. What is the greatest number o
Amiraneli [1.4K]


the answer would be 33. so the first thing you want to do is turn 7 feet into inches. if 12 inches is equal to 1 foot then 7 feet are equal to 84 inches. then add another 84  inches which will equal 168. the you would want to divide 168/15 which gives you 33.6. this mean that 33 (separate numbers) 15 inches of board from two boards.

hope I was able to help and that my explanation made sense. : ) 

7 0
3 years ago
Read 2 more answers
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