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3 years ago

What are the differences between an (Algebraic) equation and expression?

Mathematics

1 answer:

lara31 [8.8K]3 years ago

6 0

Hello!

An equation has an (=). They equal something. For example, 1+1=2 is an equation.

An expression does not have an equal sign. For example, 2 or 1+3 are both expressions. They have no equal sign.

I hope this helps!

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Two sides of an obtuse triangle measure 9 inches and 14 inches. The length of longest side is unknown. What is the smallest poss

julia-pushkina [17]

Answer:

17 inches

Step-by-step explanation:

An obtuse triangle is the triangle in which one of the side is the longest. It contains an obtuse angle and the longest side is the side that is opposite to the vertex of the obtuse angle.

Let the three sides of the obtuse triangle be a, b and c respectively with c as the longest side. Let a = 9 inches and b = 14 inches.

Now we know that for an obtuse triangle,

$c^2 > a^2 +b^2$

$c^2 > (9)^2 +(14)^2$

$c^2 > 81 +196$

$c^2 > 277$

c > 16.64

Therefore the smallest possible whole number is 17 inches.

4 0

3 years ago

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the pentagon in washington dc is immense in size, with each outside wall 921 feet in lenght. what is the perimeter of the pentag

KATRIN_1 [288]

A pentagon gas 5 sides. Therefore multiply the length of one side by 5. 921x5=4605 feet

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3 years ago

24 out of the 96 teachers in a school staff meeting were first-year teachers. What percentage of the teachers in the meeting wer

Mila [183]

25%. 24/96= .25 = 25%

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3 years ago

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Sovle for x. 2x + 6 = - r - 15

Igoryamba

Answer:

$x = \frac{-r - 21}{2}$

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Remember to do the opposite of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

First, subtract 6 from both sides:

2x + 6 (-6) = -r - 15 (-6)

2x = -r + (-15 - 6)

2x = -r + (-21)

2x = - r - 21

Next, divide 2 from both sides:

$\frac{2x}{2} = \frac{-r - 21}{2}$

$x = \frac{-r - 21}{2}$

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3 years ago

A runner is participating in a 10.3 mile race. If the runner stopped at a water station that is twice as far from the starting l

Rudik [331]

We have the representation of this problem in the figure below. As we have a 10.3 mile race, then the equation is fulfilled as:

$d = 10.3mi = d_{1}+ d_{2}$

We know that there is <span>a water station that is twice as far from the starting line as from the finish line, then:

</span> $d_{2}=2d_{1}$

So:

$d_{1} +2d_{1}=10.3$
∴ $d_{1}=3.43mi$

and $d_{2}=2(3.43)=6.86mi$

<span>Finally, the distance of the runner from the finish line is:
</span>
$6.86mi$

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3 years ago

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