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horrorfan [7]
2 years ago
8

-7,5 + 4,2 =? -0,9 * 2,7 =?

Mathematics
1 answer:
Gekata [30.6K]2 years ago
7 0

Answer:

-7.5+4.2=-3.3

-0.9*2.7=-2.43

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I'm marking brainiest if you help me :)
inn [45]

Answer:

the possible line of best fit equation is;

y = 10x + 24

Step-by-step explanation:

Here, we want to get the approximate line of best fit

Mathematically, we have the general line of best fit as

y = mx + b

where m is the slope and b is the y-intercept

By joining the given lines, we can see that the y-intercept values fall a little below 30

This means that the possible y-intercept value is 24

Now, to get the slope value, we select any two points and use the slope equation

We can have (3,50) and (6,80)

Using the slope equation;

m = (y2-y1)/(x2-x1) = (80-50)/(6-3) = 30/3 = 10

The equation is thus;

y = 10x + 24

8 0
3 years ago
There’s 25 questions in a test how many question do you have to get right to get 80%
BartSMP [9]

Answer:

20

Step-by-step explanation:

3 0
3 years ago
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Triangle ABC has vertices A( -3, 5) B ( 6, 9) and C ( -4, - 12) in the coordinate plane. The triangle is reflected over the x- a
hichkok12 [17]

Answer:

The coordinates of triangle A"B"C" will become

A( 5,-3  )  B( 9,6 )  C( -12 ,-4 )

Step-by-step explanation:

Original vertices of triangle ABC are ;

A ( -3, 5 ) B( 6, 9 )  C ( -4, -12 )

after reflection over x-axis

A( -3,-5 )   B( 6, -9 )  C( -4,12 )

when the triangle is rotated

x coordinates becomes -y  while y coordinates becomes x

The coordinates of triangle A"B"C" will become

A( 5,-3  )  B( 9,6 )  C( -12 ,-4 )

8 0
3 years ago
Please help ^ _ ^ <br><br> Geometry is not my friend :( <br><br> Please explain and show work
vova2212 [387]
Well starting with just the first statement b is congruent to c by vertical... yes. because they are formed by the intersection and non adjacent.  so A and C are still okay.

answer choice B on the other hand b is congruent to h by corresponding that is not true.. one they are not corresponding and two they are supplementary because they are same side exterior angles.  so you can eliminate B.

now the next line in answer choice a.. c and e are supplementary by ss interior... yes that is correct. 
now the next line in answer choice c.. d and h are supplementary.. that is wrong.. d and h are corresponding and therefore are congruent so you can eliminate answer choice C.

just checking the rest.. e and h are congruent by vertical.. correct.. and finally substitution to finish the proof.  So A is the correct proof.
3 0
3 years ago
Which number line shows the solution of four equals 9+ Y?
MAVERICK [17]

Step-by-step explanation:

option C

4=9+y

y=4-9= -5

3 0
3 years ago
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