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3 years ago

How do I solve for x?

Mathematics

2 answers:

7nadin3 [17]3 years ago

7 0

3) y= 5x-6
Add 6 to both sides so it's gonna be=
6y = 5x
Then divde by 5 in both sides so it's gonna be:
6y/5 = x

4) (x+y)/3 = 5
Multiply by 3 in both sides so it's gonna be:
x+y = 15
Then subtract by y to move it to the other side so it's gonna be: x = 15-y
Hope this helps

zheka24 [161]3 years ago

3 0

3.) 5x-6=0, Add 6 to either side -> 5x=6, divide each side by 5 -> x=6/5 ---- 4.) x+y/3=5, multiple each side by 3 -> x+y=15, move y to the other side -> x=-y+15

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Can you help me with both don’t know if second one is right

erma4kov [3.2K]

Answer:

1. $67.72

2. It's correct.

Step-by-step explanation:

bill: $68.89

discount: $10

tip: 15%

Calculate the total with the discount.

68.89-10=58.89

Now calculate 15% of that.

Convert 15% to decimal by dividing by 100

$\frac{15}{100}=0.15$

Multiply

$0.15(58.89)=8.83$

Add this to the original amount.

$58.89+8.83=67.72$

----------------------------------------------------------------------------

Calculate 20% of 148.25

Convert 20% to decimals by dividing by 100

$\frac{20}{100}=0.20$

Multiply

$0.20(148.25)=29.65$ This is how much they will tip.

Add this to the original bill;

$148.25+29.65=177.90$

7 0

3 years ago

Find the surface area of the prism

SVEN [57.7K]

Answer:

136 $m^{2}$

Step-by-step explanation:

Well if you find the lateral area (the area of the rectangles on the sides) to get 112, so you just need to add that to the triangles and for those (they add up to 36) you can just use the formula for the area of a triangle, which is $b*h/2$ .

Hope this helps :)

7 0

2 years ago

Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals and finds that 48 rent their

Andreas93 [3]

Answer:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

Step-by-step explanation:

Information given

$X= 48$ number of people who rent their home

$n= 250$ represent the sample size

$\hat p =\frac{48}{250}= 0.192$ represent the proportion of people who rent their home

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by: