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marin [14]
3 years ago
5

Based on information from the periodic table, what does this image represent? HE 4 Protons e 5 Neutrons = 2 Electrons A. A negat

ively charged beryllium ion
B. A neutral boron atom
C. A neutral beryllium atom
D. A positively charged beryllium ion​

Mathematics
1 answer:
shutvik [7]3 years ago
6 0

Answer:

D. A positively charged beryllium ion

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PLEASE LOOK at the photo and help me on these 2 questions :(!!!!!
Tems11 [23]

Answer:

1) f(g(2)) = 24

2) f(g(-1)) = -4

Step-by-step explanation:

1) GIven f(x) = x²+2x and g(x) = 2x

f(g(x)) = f(2x)

f(2x) = (2x)² + 2(2x)

f(2x) = 4x² + 4x

f(g(x)) = 4x² + 4x

f(g(2)) = 4(2)² + 4(2)

f(g(2)) = 16+8

f(g(2)) = 24

2) f(x) = x+1 and g(x) = 5x

f(g(x)) = f(5x)

f(5x)= 5x + 1

f(g(x)) = 5x + 1

f(g(-1)) = 5(-1) + 1

f(g(-1)) = -5+1

f(g(-1)) = -4

8 0
3 years ago
18m-9v+6v-7m hope you can help
Valentin [98]
Here, you have to combine like terms. So, it is 11m-3v.
7 0
3 years ago
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Find the area of a rhombus if its diagonals are of lengths 12.8 cm and 8.4cm
Daniel [21]

Area =

\frac{pq}{2}

where p and q are it's diagonal

so according to the rule.

\frac{12.8 \times 8.4}{2}

\frac{107.52}{2}

53.76 \\  \\

is the answer.

<em><u>hope </u></em><em><u>understands </u></em>

4 0
1 year ago
What is 304,800,400 in expanded form?
OLga [1]

300,000,000+4,000,000+800,000+400

7 0
3 years ago
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Could someone help me step by step with this question?
a_sh-v [17]
\frac{2}{3}(9+x)=-5(4-x)  \\ \\   3*\frac{2}{3}(9+x)=3*[-5(4-x)]  \\ \\ 2(9+x)=-15(4-x)  \\ \\ 18+2x=-60+15x  \\ \\ -13x=-78  \\ \\  \cfrac{-13x}{-13} = \cfrac{-78}{-13} \\ \\  x=6
7 0
3 years ago
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