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nydimaria [60]
3 years ago
10

Use mental math to find the equations that are true. Select all that apply.

Mathematics
2 answers:
Alex777 [14]3 years ago
7 0

Answer:

A, C, D, E

Step-by-step explanation:

Mariulka [41]3 years ago
7 0

Answer:c,D, and E

Step-by-step explanation:I took the test

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Why are these triangles similar?
AveGali [126]

Answer:

I think they are similar by SAS.

Step-by-step explanation:

Both triangles may not be the same size, but they have similar sides and similar angles.

4 0
2 years ago
Factor completely:<br><br> x³ - 9x
scoray [572]

Answer:

x(x+3)(x-3)

Step-by-step explanation:

Factor out common term x

=x(x^2-9)

Factor x^2-9;

(x+3)(x-3)

=x(x+3)(x-3)

3 0
3 years ago
Read 2 more answers
Alexa and Daniel , two students of middle school together collected $20 from the students for annual function of their school .
Sergeeva-Olga [200]

Answer:

x + y = 20

Step-by-step explanation:

Let the amount collected by Alexa = $x

& the amount collected by Daniel = $y

Total amount collected = $20

Therefore,

x + y = 20

4 0
2 years ago
What is the image of -1 - 5 after a dilation by a scale factor of 5 centered at the origin
amm1812

the Given data

*The given point is (-1, -5)

*The given scale factor is 5

The image of -1 - 5 after dilation by a scale factor of 5 centered at the origin ​is given as

(-1,-5)=(-1\times5,-5\times5)=(-5,-25)

Thus, the image after dilation by a scale factor of 5 centered at origin is (-5, -25)

6 0
1 year ago
Don't get this question
solniwko [45]

Answer:

17 and 18

Step-by-step explanation:

Writing every 2 digit number gives us :

10-99 including 10 and 99

For the first one we are looking for numbers where the number 3 appears only once so 33 would be invalid.

13,23,30,31,32,34,35,36,37,38,39,43,53,63,73,83,93

There are 17 2-digit numbers that have 3 exactly once

For the second one we are looking for number where the number 3 appears a minimum of once so 33 would be valid :

13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93

There are 18 2-digit numbers that have 3 at least once

Hope this helped and have a good day

5 0
1 year ago
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