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3 years ago

What is the area of a triangle with the coordinates (-4,14) (10,0) (-14,-10)

1 answer:

3 0

You can use Heron Formula in the calculator to output the result, but i still show you the steps on paper thro

lengths of the 3 lines: \sqrt{392} , \sqrt{676} , \sqrt{676}

s= (\sqrt{392} + \sqrt{676} + \sqrt{676})/2=35.89949494

area= \sqrt{s(s- \sqrt{392} )(s- \sqrt{676})^2 } =238

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Janelle has $75. she buys jeans that are discounted 30% and then uses an in-store coupon for $10 off the discounted price. After

Bad White [126]

So, she paid (75-17.34=57.66) for the purchase

Or, the jeans costed 57.66-3.26=54.4 (prize minus sales tax)

But she got a 10 dollars off! so that means that the jeans actually costed 64.4

now, the 64.40 was the prize discounted by 30%:

64.40=(100-30)%*x

where x was the original prize

64.40=0.7x
644=7x
x=644/7
x=92

so the original prize was 92 dollars.

5 0

3 years ago

Marissa would like to estimate the sum of 6821 + 4963. Explain how Marissa could use rounding to make an estimate.

Natali [406]

Marissa would round 6,821 to 7,000 and 4,963 to 5,000. Then she would add 7,000 and 5,000 and get 12,000.
The exact answer would be 11,784.

6 0

3 years ago

Read 2 more answers

How many solutions does the equation have?

qaws [65]

The answer is A. one solution

4 0

3 years ago

Read 2 more answers

Pending Review Question 7

vitfil [10]

Answer:

$ 2,200 for 8%, $ 1,300 for 12%

Step-by-step explanation:

I=PRT

Let Bank 1 be <em>x</em>

332= x (8%) + (3,500-x) 12%

332= x (0.08) + (3,500-x) 0.12 change the percent to decimal

332= 0.08x + 420 - 0.12x

0.04x= 420-332

x= $\frac{88}{0.04}$

x= 2,200 (Bank 1)

Bank 2= 3,500-Bank 1

Bank 2= 3,500- 2,200

Bank 2= 1,300

4 0

3 years ago

Enrique leaves his house and starts to run at an average speed of 6 miles per hour. Half an hour later, Enrique’s younger (and f

Sloan [31]

Answer:

t= 0.8 hr or 48 min.

Step-by-step explanation:

Speed of Enrique= 6 mph

Half and hour late it means that after 1/2 hr.

Speed of Enrique brother = 8 mph

Lets take Enrique cover x distance in time t hr .

x = 6 t ------------ 1

Then his brother will cover x/2 distance in time (t-1/2) hr.

x/2 = 8 (t-1/2) -----------------2

Now from equation 1 and 2

6 t = 16 (t-1/2)

6 t = 16 t - 8

So t= 0.8 hr or 48 min.

It means that his brother will take 0.8 hr to cover half of distance cover by Enrique .

6 0

3 years ago