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lianna [129]
3 years ago
12

Please awnser quick Evaluate: -8w + 3z when w = 2.2, and z = -9.1

Mathematics
2 answers:
Andrew [12]3 years ago
7 0

Answer:

-44.9

Step-by-step explanation:

-8(2.2) = -17.6

3(-9.1) = -27.3

-17.6 + (-27.3) = -44.9

:)

dezoksy [38]3 years ago
4 0

Answer:

11.5

Step-by-step explanation:

1) -8×2.2 + 3×-9.1= Fill in W and Z into the formula

2) 17.6- 6.1= Work out the multiplications

3) 17.6- 6.1= 11.5

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1. Simplify. 5–1(3–2)
konstantin123 [22]

Answer with explanation:

Using following law of indices

1.x^a \times x^b=x^{a+b}\\\\2. (x^m)^n=x^{mn}\\\\ 3. x^{-n}=\frac{1}{x^n}\\\\4. \frac{x^m}{x^n}=x^{m-n}

1.5^{-1}\times 3^{-2}=\frac{1}{5}\times\frac{1}{3^2}\\\\=\frac{1}{5\times9}\\\\=\frac{1}{45}\\\\2. \frac{mn^{-4}}{p^0*q^{-2}}=\frac{mq^2}{n^4}\\\\ 3.0.0042=4.2\times 10^3\\\\4.6.12 \times 10^3=6.12 \times 1000=6120\\\\ 5.0.5 \times(8\times10^5})=\frac{1}{2}\times8 \times 10^5=4\times 10^5\\\\6. (9 \times 10^3)^2=9^2 \times (10^3)^2=81 \times 10^6\\\\7.( \frac{1}{2}a^{-4}\times b^2 )_{a=-2,b=4}{\text{or}}( \frac{1}{2}a^{4}\times b^{-2} )_{a=-2,b=4}=\frac{1}{2}\times (-2)^{-4}\times(4)^2{\text{or}}=\frac{1}{2}\times (-2)^{4}\times(4)^{-2}=\frac{16}{2\times16}=\frac{1}{2}

9. (4\times x\times y^2)^3\times (xy)^5=4^3\times x^3\times (y^2)^3\times x^5 \times y^5\\\\=64\times x^{3+5}\times y^{5+6}\\\\=64x^8y^{11}\\\\10.(2\times t^3)^3(0.4\times r)^2=2^3 \times (t^3)^3\times (0.4)^2 \times r^2=8\times t^9 \times 0.16 \times r^2=1.28r^2t^9

8. A number raised to a negative exponent is negative.

Explaining with the help of few examples

 1.2^{-3}=\frac{1}{2^3}=\frac{1}{8}\\\\ 2.(-3)^{-3}=\frac{1}{(-3)^{3}}=\frac{-1}{27}

Option C: Sometimes

1.Option B

2.Option A

3.Option C

4.Option A

5.Option D

6.  81 \times 10^6

7.Option B

8.Option C

9.Option A

10.Option  1.28 r^2 \times t^9

4 0
4 years ago
Read 2 more answers
8x+7/6 + 3-2x/4-5x-2/2=32<br> Find x
ipn [44]
<span>(8x+7)/6 + (3-2x)/4-(5x-2)/2=32
2(8x+7) + 3(3-2x) - 6(5x-2) = 384
16x + 14 + 9 - 6x - 30x + 12 = 384
-20x + 35 = 384
-20x = 349
     x = -17.45

</span>
7 0
3 years ago
Read 2 more answers
Which of these can NOT be written as an equation?
Aleksandr [31]

Answer:

Two times t minus 6

Step-by-step explanation:

Mathematically,it is written as 2t-6

And in order for a set of characters to be written as an equation,there has to be an answer or definite result and has the "=" sign

4 0
3 years ago
What is the volume of sphere of radius 6 m.
Tems11 [23]

Answer:

904.78 m³

Step-by-step explanation:

V = 4/3 × π r³ = 4/3 × π × 6³ = 904.78

8 0
3 years ago
mr chan has three daughters ,an, lien and tao , aged 7,8 and 10 years respectively. he shares $100 between them in the ratio of
Valentin [98]

Step-by-step explanation:

The money was shared in the ratio of their ages which represents

7:8:10 respectively

  • Lien = 8
  • 7+8+10=25
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  • = $32
5 0
3 years ago
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