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kakasveta [241]
3 years ago
15

Help number 25. A and B and C

Mathematics
1 answer:
ahrayia [7]3 years ago
4 0
A) 12.5/5 =  $ 2.5;

B) 8*2.5 = $ 20;

C) 7.50/2.50 = 3 - pound.
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HURRY!! 22.7-3w=3.5. Solve for w​
enot [183]

Answer:

Step-by-step explanation:

-3*w=3.5-22.7

w= -19.2/-3

w= 6.4

4 0
3 years ago
Read 2 more answers
thomas has 4 blocks colored blue,red,green and yellow. How many different ways can he combine them on a shelf?
puteri [66]

Answer: 24

Step-by-step explanation:

Take the factorial of that number.

4! = 4*3*2*1=24

8 0
3 years ago
Explain why (–4x)0 = 1, but –4x0 = –4.
hodyreva [135]
Any number raised to power of 0 is 1.
In (-4x)^0, because of the parenthesis, the whole number is being raided to 0, which gives 1.
But in -4x^0, only x is being raised to 0, thus -4x^0 = -4(1) = -4.
5 0
3 years ago
When the expression $-2x^2-20x-53$ is written in the form $a(x+d)^2+e$, where $a$, $d$, and $e$ are constants, then what is the
Sladkaya [172]
We start with 2 x^{2} -20x-53 and wish to write it as a(x+d) ^{2} +e

First, pull 2 out from the first two terms: 2( x^{2} -10x)-53

Let’s look at what is in parenthesis. In the final form this needs to be a perfect square. Right now we have x^{2} -10x and we can obtain -10x by adding -5x and -5x. That is, we can build the following perfect square: x^{2} -10x+25=(x-5) ^{2}

The “problem” with what we just did is that we added to what was given. Let’s put the expression together. We have 2( x-5) ^{2}-53 and when we multiply that out it does not give us what we started with. It gives us 2 x^{2} -20x+50-53=2 x^{2} -20x-3

So you see our expression is not right. It should have a -53 but instead has a -3. So to correct it we need to subtract another 50.

We do this as follows: 2(x-5) ^{2}-53-50 which gives us the final expression we seek:

2(x-5) ^{2}-103

If you multiply this out you will get the exact expression we were given. This means that:
a = 2
d = -5
e =  -103

We are asked for the sum of a, d and e which is 2 + (-5) + (-103) = -106


7 0
3 years ago
Four students spoke to the Home and School parents for a total of 2/3 hour. Each student spoke for the same amount of time. How
xeze [42]

creo que la respuesta el 10 minutos, porque dice "horas" pero no dice a cuantas horas equivale :)      espero que te aya adudado auque sea un poquito

8 0
3 years ago
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