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anygoal [31]
4 years ago
15

Simplifying by adding, subtracting, multiplying, or dividing: (2/3)-(2/5)

Mathematics
1 answer:
Volgvan4 years ago
8 0
The answer is 4/15 or .26 with the 6 repeating forever.
Explanation: Least common multiple of 3 and 5 is 15. 2*5=10, 2*3=6. 10/15-6/15=4/15.
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The square of 9 less than a number is 3 less than the number. What is the number?
Y_Kistochka [10]
7 or 12 as both are more that the square of 9 (3)
3 0
4 years ago
Vertex (0,1) x intercepts is - 1 and 1 what is the equation of the parabola?
MrRa [10]
\bf y=a(x-{{ h}})^2+{{ k}}\\
x=a(y-{{ k}})^2+{{ h}}\qquad\qquad  vertex\ ({{ h}},{{ k}})

those are the vertex form of a parabola... so hmmm
the vertex of this one is at 0,1 and intercepts or "solutions" are at -1 and 1, so is opening downwards, notice the picture below

that means, the squared variable is the "x", thus the form is \bf y=a(x-{{ h}})^2+{{ k}}

now, we know the vertex is at 0,1, and two x-intercepts of \pm 1,0

thus      \bf y=a(x-{{ h}})^2+{{ k}}\qquad 
\begin{cases}
h=0\\
k=1\\
when
\\
x=\pm 1\\
y=0
\end{cases}
\\\\\\
\textit{so.. hmmm let us use the point ... say hmmm 1,0}
\\\\
y=a(x-{{ h}})^2+{{ k}}\implies 0=a(1-0)^2+1

solve for "a", to see what that coefficient is, then plug it back in the vertex form equation

6 0
3 years ago
You accept a job with a salary of $37,600. After 6 months, you receive a 4% raise. What is your new salary?
mart [117]

Answer:

$39,104

Step-by-step explanation:

4% as a decimal is 0.04.

Multiply 0.04 by 37,600

37,600×0.04= 1,504

Add 1,504 to 37,600

37600+1504=39,104

3 0
4 years ago
Read 2 more answers
Marc eats an egg sandwich for breakfast and a big burger for lunch every day. The egg sandwich has 250 calories. If Marc has 5,2
Svetach [21]

Answer: 5,000 calories

Step-by-step explanation:

Subtract both

7 0
3 years ago
Find an equation for the line below.<br><br><br> will give brainiest
pogonyaev

Answer: y=-\frac{x}{2}-6.5

Step-by-step explanation:

First find slope m. From observing the equation we can see that there are two points on the line. They are (-5,-4) and (-1,-6). Using the formula to find slope rise/run we get m = -0.5.

Now we use the point-slope formula to start the switch to the slope-intercept formula. Using (-1,-6) as our x and y values and switching m=-0.5 we get y + 6 = -0.5 ( x + 1). Simplify and we get y + 6 = -x/2 - -0.5. Subtract 6 from both sides and the final equation is y = -x/2 - 6.5.

8 0
3 years ago
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