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2 years ago

Which of the following statements represents a mathematical expression?

Mathematics

2 answers:

alukav5142 [94]2 years ago

6 0

A is the answer because equations always have “equal to” or “=“.

4vir4ik [10]2 years ago

5 0

A because there is a difference between a expression and equation. Expressions don’t have a equal sign or an answer. But equations have an equal sign and an answer. So because everything else has an answer or equal sign, the correct answer would be A. Hope this helps!

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The graph of a quadratic function contains (4,-64) and it's vertex is at the origin.write an equation for this function.

lesya692 [45]

Answer:

Step-by-step explanation:

Not sure what form you need this in, but it really doesn't matter, as you'll see in the final equation. I used the vertex form and solved for a:

$y=a(x-h)^2+k$

We are given the vertex (h, k) as the origin (0, 0), and we have a point that the graph goes through as (4, -64). That's our x and y. Plugging in what we have:

$-64=a(4-0)^2+0$ gives us

-64 = 16a and

a = -4. That means that the quadratic equation is

$y=-4x^2$ which is both vertex form and standard form here, no difference.

5 0

3 years ago

Elias was given a lock for his school locker. The lock contains numbers between

daser333 [38]

Answer:

34,220

Step-by-step explanation:

Because order doesn't matter, but the numbers can't be repeated, we need to find the number of combinations where 3 individual numbers can be chosen out of 60 possible numbers using the binomial coefficient:

$\binom{n}{k}=\frac{n!}{k!(n-k)!}\\ \\\binom{60}{3}=\frac{60!}{3!(60-3)!}\\\\\binom{60}{3}=\frac{60!}{3!(57)!}\\\\\binom{60}{3}=\frac{60*59*58}{3*2*1}\\ \\\binom{60}{3}=34220$

Thus, Elias can make 34,220 unique 3-number codes given 60 different numbers.

6 0

1 year ago

Tessa spent $22 on 11 song downloads. How much did each song cost?

Reika [66]

Answer:

Each song cost $2

Step-by-step explanation:

2 times 11 is 22

Make me brainliest if this helps!

4 0

2 years ago

Read 2 more answers

What is 183 for 4 as a unite rate

olganol [36]

Answer:

45.75

Step-by-step explanation:

183/4=45.75.

3 0

2 years ago

Read 2 more answers

Can a polygon have for it faces 3 triangles . explain

AVprozaik [17]

Answer:

Can a polyhedron have for its faces 3 triangles? A polyhedron is bounded by four or more than four polygonal faces. No, it is not possible that a polyhedron has 3 triangles for its faces.

Step-by-step explanation:

Please mark as brainliest

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3 years ago