Find distance between two points --> root( (x2 - x1)^2 + (y2 - y1)^2 ) = root (3^2 + 7^2) = root ( 58), as one unit is two miles then 2* root(58) = 15.23 miles.

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7 0

3 years ago

Joy needs to mix a 20% acid solution with a 60% acid solution to create 100 millileters of a 28% solution. How many millileters

dalvyx [7]

Answer:

Joy must use 80 milliliters of solution at 20% and 20 milliliters of solution at 60%

Step-by-step explanation:

Let

x -----> milliliters of solution at 20%

y -----> milliliters of solution at 60%

we know that

$x+y=100$ ----> equation A

$20\%=20/100=0.20$

$60\%=60/100=0.60$

$28\%=28/100=0.28$

$0.20x+0.60y=0.28(x+y)$

$0.20x+0.60y=0.28(100)$

$0.20x+0.60y=28$ ----> equation B

Solve the system of equations by graphing

Remember that the solution of the system is the intersection point both graphs

The solution is the point (80,20)

see the attached figure

therefore

Joy must use 80 milliliters of solution at 20% and 20 milliliters of solution at 60%

4 0

3 years ago

Max picked out an old Star Wars puzzle to put together. Out of the 250 pieces, he was missing 15.

laiz [17]

ANSWER: 6%

Explanation: 15 divide by 250 is 0.06

5 0

2 years ago

Tony's pizza guarantees all pizza deliveries within 30 minutes of the placement of orders. an agency wants to estimate the propo

svp [43]

The real answer is 1691.3, however when rounded, 1692 deliveries.

7 0

3 years ago