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DochEvi [55]
3 years ago
13

Raul used this method to find the sum of 427+316.

Mathematics
2 answers:
Serga [27]3 years ago
7 0
427+316 will equal 743 and to check your work you can subtract
Natalka [10]3 years ago
3 0
It is like
427+316=743
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The value, in dollars, of a 1951 bowman willie mays baseball card is given by the function b left parenthesis x right parenthesi
vovikov84 [41]
In more conventional notation, ...
  b(x) = -15x² +450x +325 . . . . 0 ≤ x ≤ 24

For 1990, x = 1990 - 1983 = 7
b(7) = -15·7² +450·7 +325 = 2740

The value of the card in 1990 was 2740.
6 0
3 years ago
I need to find angle M
nadezda [96]

Answer:

m<AIR = 90 deg

Step-by-step explanation:

I assume the problem contains an error, and that AR is a diameter, not AC.

Look at the diameter of the circle, AR. It passes through the center of the circle, C. You can think of the two radii of the circle, CR and CA, as sides of angle RCA. Since AR is a diameter, and AR is a segment which is part of line AR, rays CR and CA are sides of an angle that lie on a line. That makes the measure of angle RCA 180 deg. Angle RCA is a central angle of circle C since its vertex is the center of the circle.

Angle AIR is an inscribed angle in circle C since its vertex is on the circle itself. If an inscribed angle and a central angle intercept the circle at the same two points, then the measure of the inscribed angle is half the measure of the central angle.

m<AIR = (1/2)m<RCA = (1/2) * 180 = 90

m<AIR = 90 deg

7 0
3 years ago
Need help with 13 and 14
Svetach [21]

Answer:

13. A

14. C.

Step-by-step explanation:

A relation is a function if there is only one y assigned to each x.

That is if you have a set of points, there should be no repeated x value.

So looking at {(0,0),(-2,4),(-2,-4),(-3,7)} this is not a function because you have two x's that are the same. A.

The slope-intercept form of a linear equation is y=mx+b where m is the slope and b is the y-intercept.

The y-intercept is where the graph goes through the y-axis at.  It goes through at -1 so b=-1.

The slope is rise/run.  So starting from the y-intercept (0,-1) we need to find another point to count the rise & run to... How about (3,1)? That works.  You can do the counting if you want. You could also use the slope formula.

To use the slope formula, I just like to line the points up vertically and subtract vertically then put 2nd difference over the 1st difference.

(0,-1)

-(3,1)

--------

-3  -2

So the slope is -2/-3 or just 2/3.

So the equation is y=2/3 x-1

C.

3 0
3 years ago
Hector surveyed all the sixth graders at his school about their favorite after-school activity.The table shows the results that
sergejj [24]
Ok first add all of the results together 44+55+55+66=220     Then found out how many percent each number is of 220.   44 is 20% of 220,  55 is 25%, 55 is 25%,    66 is 30% 
7 0
3 years ago
Which expression is equivalent to 3x+10−x+12 ?
Stells [14]

Answer:

D)---—————------->

2x+22

6 0
3 years ago
Read 2 more answers
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