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Xelga [282]
2 years ago
12

G

Mathematics
1 answer:
kvv77 [185]2 years ago
8 0

Answer:

Girls in Mr. Chang's class: 28 - 21 ; # girl students = # total students - # boy students ; 7 girl students.

Boys in Mr. Chang's class: 28 - 7 ; # boy students = # total students - girl students ; 21 boy students.

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Help, please!!<br><br><br> How much is 2/5 of 20 ?
Alex787 [66]

Question

Help, please!!

How much is 2/5 of 20 ?


Answer:

8

Step-by-step explanation:

20 * 2/5 =

8

----------------------

20 : 5 * 2 = 8


7 0
3 years ago
Read 2 more answers
A+10+44=2a<br> what does a equal!
Ymorist [56]

Answer:

a=54

Step-by-step explanation:

a+10+44=2a

54=2a-a

54=a

6 0
3 years ago
NEED HELP ASAP PLEASE I CANT FAIL
kati45 [8]

Answer:

220 miles

Step-by-step explanation:

65 miles per hour for 2 hours — 65+ 65 = 130

60 miles per hour for 1.5 hours — 60 (for the 1 hour) + 30 (for the half hour) = 90

130 + 90 = 220

7 0
3 years ago
Read 2 more answers
Prove that the following four points will form a rectangle when connected in order
Lemur [1.5K]

Answer:

Step-by-step explanation:

If the diagonals of the rectangle are congruent,

AC = BD

By using formula to calculate the distance between two points,

Distance between two points = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Distance between A(0, -3) and C(2, 8),

AC = \sqrt{(8+3)^2+(2-0)^2}

     = \sqrt{125}

     = 5\sqrt{5}

Similarly, distance between two points B(-4, 0) and D(6, 5),

BD = \sqrt{(5-0)^2+(6+4)^2}

     = \sqrt{125}

     = 5\sqrt{5}

Therefore, both the diagonals are congruent.

Hence, given quadrilateral ABCD is a rectangle.

8 0
3 years ago
Please Help I Don't Understand!
asambeis [7]

Answer:

5.3

Step-by-step explanation:

Since they are similar triangles, we assume the ratio between AM/AN is equal to the ratio between MB/NC.
AM/AN = 6/8 = 3/4
If MB is 4
3/4 = MB/NC = 4/NC
3/4 = 4/NC

3NC = 16
NC = 16/3
16/3 = 5.333333

8 0
1 year ago
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