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3 years ago

How many ways can four items be selected from a group of seven items?

Mathematics

1 answer:

Neko [114]3 years ago

4 0

7!/(7-4)! = 840 ways

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The scale of a map is 1 inch = 25 miles. How many miles does 1.25 inches represent?

otez555 [7]

31.25 miles because I don’t know

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3 years ago

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Who can help me out with this question???

GaryK [48]

Answer:

x = 13

Step-by-step explanation:

$a^{2} +b^2 = c^2\\12^2 + 5^2 = c^2\\144 + 25 = c^2\\169 = c^2\\$

Take the square root of both sides

$\sqrt{169} = \sqrt{c^2} \\13 = c$

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3 years ago

At a restaurant the cost for a breakfast taco and a small glass of milk is $2.10. The cost for 2 tacos and 3 small glasses of mi

tangare [24]

Answer:

The price for a small glass of milk is $0.95, and the price for a breakfast taco is $1.15.

Step-by-step explanation:

Let the price of a taco be x and the price for a small glass of milk be y.

$x + y = 2.1$

$2x + 3y = 5.15$

Multiply the first equation by 2:

$2x + 2y = 4.2$

Subtract the new third equation from the second equation:

$(2x + 3y) - (2x + 2y) = 5.15 - 4.2$

$y = 0.95$

Hence, the price for a small glass of milk is $0.95.

Substitute y into the first equation.

$x + 0.95 = 2.1$

$x = 1.15$

Therefore, the price for a breakfast taco is $1.15.

Hope this helped!

3 0

2 years ago

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Write a quadratic equation in standard form with the given roots of 3,-4

nexus9112 [7]

Answer:

Since the roots are 3, -4 then we must put

-3, 4 into this equation,

(x +a) * (x +b) = 0

(x -3) * (x +4) = 0 then multiplying

x^2 +x -12

Step-by-step explanation:

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3 years ago

What is 1/4 + 5/6 equals what

Alex

Answer:

1 1/12

Step-by-step explanation:

You need to find a common denominator that fits both 1/4 and 5/6. We know that 12 fits both, so we multiply each to get it, for example:

1/4 = 3/12

5/6 = 10/12

Now we say 3/12 + 10/12 = 13/12 and simplify to get 1 1/12

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3 years ago

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