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kirill115 [55]
3 years ago
10

Fill in the blanks-

Mathematics
1 answer:
matrenka [14]3 years ago
8 0

unlike charges attract like charges repel

Atoms have positive protons, no charge neutrons and negative electrons


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Which ratio is not equivalent to the other three?
strojnjashka [21]
C(12/15) because the other 3 all equal 0.666666666666667 but 12/15 equals 0.8
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Will give brainliest
serg [7]

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c

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2 years ago
I need help with this one please
skelet666 [1.2K]

Answer:

perimeter of figure = 24.28

Step-by-step explanation:

semicircle ' s perimeter = π r = 3.14 × 2 = 6.28 cm

perimeter of 3 sides of parallelogram = 7 +7+4= 18 cm.

perimeter of figure = 18 +6.28 = 24.28

approx value = 24.30 cm

3 0
2 years ago
A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 45% pure anti
kykrilka [37]

Answer:

First brand = 18 gallons

Second brand = 12 gallons

Step-by-step explanation:

Let the first brand brand be A and the second brand be B.

Thus, since he wants to obtain 30 gallons of a mixture that contains 30% pure antifreeze, then we have;

A + B = 30 - - - (eq 1)

Also; The first brand is 20% pure antifreeze, and the second brand is 45% pure antifreeze. Thus;

0.2A + 0.45B = (0.3 × 30)

0.2A + 0.45B = 9 - - - (eq 2)

From eq 1, we have; A = 30 - B

Put 30 - B for A in eq 2;

0.2(30 - B) + 0.45B = 9

6 - 0.2B + 0.45B = 9

0.25B = 9 - 6

0.25B = 3

B = 3/0.25

B = 12

Thus, A = 30 - 12 = 18 gallons

6 0
3 years ago
N:2 = 15/5 solve it for n<br><br>​
telo118 [61]

Step-by-step explanation:

N:2 = 15:5

N\2 = 15\ 5

Now cross multiply,

5N = 30

N = 6

5 0
2 years ago
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