All categories

4 years ago

Determine if y = 5 is a solution for 2y = 15.

Mathematics

2 answers:

kodGreya [7K]4 years ago

6 0

Answer:

y=7.5

Step-by-step explanation:

Greeley [361]4 years ago

4 0

Answer:

y=5 does not equal 2y=15

Step-by-step explanation:

If you plug y into the equation we get 2(5)=15

The next step is to multiply 2*5, which equals 10

10≠15

You might be interested in

A 9.85 m ladder is placed against a wall. The height to the top of the ladder is 5 m more than the distance between the wall and

Dafna1 [17]

Given:

Length of the ladder = 9.85 m

The height to the top of the ladder is 5 m more than the distance between the wall and the foot of the ladder.

To find:

The height to the top and the distance between the wall and the foot of the ladder.

Solution:

let x be the distance between the wall and the foot of the ladder. Then the height to the top of the ladder is (x+5).

Pythagoras theorem: In a right angle triangle,

$Hypotenuse^2=Base^2+Perpendicular^2$

In the given situation, hypotenuse is the length of ladder, i.e., 9.85 m. The base is x m and the height is (x+5) m.

Using the Pythagoras theorem, we get

$(9.85)^2=x^2+(x+5)^2$

$97.0225=x^2+x^2+10x+25$

$0=2x^2+10x+25-97.0225$

$0=2x^2+10x-72.0225$

Here, $a=2, b=10,c=-72.0225$ . Using the quadratic formula, we get

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

$x=\dfrac{-10\pm \sqrt{(10)^2-4(2)(-72.0225)}}{2(2)}$

$x=\dfrac{-10\pm \sqrt{676.18}}{4}$

Approximating the value, we get

$x=\dfrac{-10\pm 26}{4}$

$x=\dfrac{-10+26}{4},\dfrac{-10-26}{4}$

$x=\dfrac{16}{4},\dfrac{-36}{4}$

$x=4,-9$

Distance cannot be negative so $x\neq -9.$

Now we have $x=4$

$x+5=4+5$

$x+5=9$

Therefore, the base is 4 m and the height is 9 m.

5 0

3 years ago

What is the polynomial function of least degree whose only zeros are -4,2, and 3?

Anton [14]

Answer:

never heard about it

Step-by-step explanation:

3 0

3 years ago

How do you simplify the answer for 185/200

butalik [34]

Answer:

37/40

Step-by-step explanation:

Divide by 5 to both numbers, since they both end in a 0 or 5.

185/5= 37

200/5= 40

I believe this is your answer since it cannot be simplified anymore.

8 0

4 years ago

Read 2 more answers

Find the value for the following determinant. -32 -42 42

hjlf

Using the rule for 2x2 matrices,

$\begin{vmatrix}a&b\\c&d\end{vmatrix}=ad-bc$

the determinant for your matrix is

$\begin{vmatrix}5&-4\\8&2\end{vmatrix}=5\times2-(-4)\times8=42$

4 0

4 years ago

Read 2 more answers

I don't understand how I'm suppose to find the height of point A above the ground...I don't get it.

olga_2 [115]

Yes.. exactly what the question says.. the graph has a line at bottom then 2 poles a right and left.. you measure from the straight line across to the point A at left pole.

~Hope This Helps~

5 0

4 years ago