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3 years ago

(25–a)÷7=3 i need help and fast!

Mathematics

2 answers:

maxonik [38]3 years ago

8 0

the answer will be 4

Vikentia [17]3 years ago

4 0

the variable a would be 4

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F(x) = x2 + 1 f(-3)=)

ozzi

Answer:

f(-3) means, put -3 at x

therefore, f(-3)= 3²+1

=10

5 0

3 years ago

Solve the formula for the indicated variable. A = 4πr² for r when r > 0 r =

SashulF [63]

Answer:

√(A/4π) = r

Step-by-step explanation:

A = 4πr²

r² = A/4π

r = √(A/4π)

8 0

2 years ago

Read 2 more answers

True or false 1. All parallelograms are squares.2. All squares are parallelograms. 3. All trapezoids are scalene.4. All squares

ruslelena [56]

1-2:Yes. But not all parallelograms are squares
3-false ! are plane figures.
4-True ! Every square is a rhombus
5-False , every rhombus is not a square.
6-7 : Yes, all Squares are rectangles, but not all rectangles are squares because it needs to have all equal sides.

4 0

2 years ago

What is x if n≠m? Please help!

lorasvet [3.4K]

Answer: $x = \frac{mn(q - p)}{n-m}\\\\$

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Work Shown:

Part 1

$\frac{x-m}{m} + p = \frac{x-n}{n} + q\\\\\frac{x-m}{m} - \frac{x-n}{n} = q - p\\\\\frac{n(x-m)}{mn} - \frac{m(x-n)}{mn} = q - p\\\\\frac{xn-mn}{mn} - \frac{xm-mn}{mn} = q - p\\\\\frac{xn-mn-(xm-mn)}{mn} = q - p\\\\$

Part 2

$\frac{xn-mn-xm+mn}{mn} = q - p\\\\\frac{xn-xm}{mn} = q - p\\\\\frac{x(n-m)}{mn} = q - p\\\\x(n-m) = mn(q - p)\\\\x = \frac{mn(q - p)}{n-m} \\\\$

-------------------------------

Explanations:

There are quite a bit of steps. I decided to break things into two parts.
The goal is to get x all by itself on its own side, which is why I subtracted (x-n)/n from both sides in part 1, step 2. I also subtracted p from both sides.
Afterward, I gave each fraction the LCD mn. I multiplied top and bottom of the first fraction by n/n. I did a similar operation to the second fraction, but with m instead.
From there, we distribute and simplify. The mn terms cancel on the left side numerator (second step of part 2).
The n≠m is there to prevent the denominator (n-m) from being zero. We cannot divide by zero.
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7 0

2 years ago

Combine the like terms to create an equivalent expression 5k+(-2k)-(-1)

Ad libitum [116K]

Answer:

3k+1

Step-by-step explanation:

5k+-2k= 3k

3k--1 = 3k+1

hope this helps!!!!!!!!!!

3 0

2 years ago