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STALIN [3.7K]
3 years ago
10

Can you help with all math questions?

Mathematics
2 answers:
forsale [732]3 years ago
7 0
No but , they can be pretty easy sometimes
morpeh [17]3 years ago
6 0
Maybe but i don’t really know
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How do you answer a, b and c, answers and also how you worked it out
Kruka [31]

We can either convert to standard form first or convert to a common multiplier, kinda like a common denominator.  The latter makes more sense if they wanted the result in scientific notation, but let's do it that way anyway.

a)

4.5 × 10⁴ + 3.8  × 10³ = 45 × 10³ + 3.8  × 10³ = 48.8× 10³ = 48,800

Answer:  48,800

b)

4.5 × 10⁴ - 3.8  × 10³ = 45 × 10³ - 3.8  × 10³ = 41.2× 10³ = 41,200

Answer:  41,200

c)

7.2 × 10⁻³ + 6.3  × 10⁻² = 7.2 × 10⁻³ + 63  × 10⁻³ = 70.2 × 10⁻³

       = 7.02 × 10⁻² = 0.0702

Answer: 0.0702

4 0
3 years ago
Find the length of the unknown side. Round your answer to the nearest tenth.
slamgirl [31]

Answer:

11.5

Step-by-step explanation

a^2+b^2=c^2

8(8)+(x)^2=196

64 + x^2=196

\sqrt{x^{2} }=\sqrt{132}

x=11.48

x=11.5 rounded

6 0
3 years ago
A deposit for a trip is $986. If you pay today, you can receive a 10% discount. What will the deposit be if you pay today?
stepan [7]

Answer:

887.4

Step-by-step explanation:

Please mark me as brainliest if I get it right

3 0
3 years ago
Read 2 more answers
How to find the general solution to y"'+2y"-4y'-8y=0?
S_A_V [24]
y'''+2y''-4y'-8y=0

has characteristic equation

r^3+2r^2-4r-8=r^2(r+2)-4(r+2)=(r^2-4)(r+2)=(r-2)(r+2)^2=0

which has roots at r=\pm2. The negative root has multiplicity 2. So the general solution is

y=C_1e^{2x}+C_2e^{-2x}+C_3xe^{-2x}
8 0
3 years ago
Which of the following expressions are equivalent to 30 - 8x - 6 - 5x?
olganol [36]

I think it's the 2 one I'm 76 percent sure

6 0
3 years ago
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