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3 years ago

Find the volume. Help please it’s due tomorrow

Mathematics

1 answer:

Dmitry_Shevchenko [17]3 years ago

5 0

Answer:

2cm

Step-by-step explanation:

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Will mark as brainlist

lara [203]

Step-by-step explanation:

Tn=ar^(n-1)

r=-10/-5=2

a=-5

Tn=-5×(2)^(n-1)

Tn=-5•(2)^(n-1)

an=5•(2)^(n-1)

7 0

2 years ago

The sum of two numbers is 51 and the difference is 15 what are the numbers

Nesterboy [21]

X + y = 51
x - y =15

2x = 66
x = 33

33 + y = 51
y = 18

4 0

3 years ago

Read 2 more answers

11. Write the balanced equation for the reaction of HC2H3O2, with Al(OH)3 to form H2O and Al(C2H302)3:

Kamila [148]

Answer:

74.36 g of aluminium acetate.

730.27g of aluminium acetate.

- to the nearest hundredth.

Step-by-step explanation:

Acetic acid is usually written as CH3COOH.

a. 6CH3COOH + Al(OH)3 ---> Al(CH3COO)3 + 9H2O

So 6 moles of acetic acid produce 1 mole of aluminium acetate.

Using the molecular masses

6*( 1.008*4 + 12.011*2 + 16 *2) g acetic acid gives (26.98+3(36.032+ 2*12.011)

348.228 g acetic acid gives 207.142 g Al acetate.

So 125 g gives (207.142 / 348.228) * 125

= 74.36 g of aluminium acetate.

(26.98 + 3*16 + 3 * 1.008) g of Al(OH)3 gives 207.142 g Al acetate

78.004 g gives 207.142 g Al acetate

275 g gives (207.142 / 78.004) * 275

= 730.27g Al acetate.

7 0

4 years ago

I need help answer these and show your work please I really need help I will make you brainily person and give you points.!!

valentinak56 [21]

Answer:

#1 s=-133/5

#3 a. b=-4

#3 b. x=23.45

#3 c. p=201

Step-by-step explanation:

#1 −5(s+30)=−17

Step 1: Simplify both sides of the equation.

−5(s+30)=−17

(−5)(s)+(−5)(30)=−17(Distribute)

−5s+-150=−17

−5s−150=−17

Step 2: Add 150 to both sides.

−5s−150+150=−17+150

−5s=133

Step 3: Divide both sides by -5.

−5s−5=133/−5

s=−133/5

#3 a. $-\frac{1}{2} (b-6)=5$

Step 1: Multiply both sides by 2

$(-\frac{1}{2} (b-6))(-2)=5(-2)$

Step 2: Simplify

b-6=-10

Step 3: Add 6 to both sides

b-6+6=-10+6

Step 4: Simplify

b=-4

#3 b. 0.4t(x-0.45t)=9.2

Step 1: Divide both sides by 0.4

$\frac{0.4t(x-0.45t)}{0.4} =\frac{9.2}{0.4}$

Step 2: Simplify

x-0.45=23

Step 3: Add 0.45 to both sides

x-0.45+0.45=23+0.45

Step 4: Simplify

x=23.45

#3 -4(p-212)=44

Step 1: Divide both sides by -4

$\frac{-4\left(p-212\right)}{-4}= \frac{44}{-4}$

Step 2: Simplify (there is way more to this step than I am putting)

p-212=-11

Step 3: Add 212 to both sides

p-212+212=-11+212

Step 3: Simplify

p=201

4 0

3 years ago

Solve by factorising 2x^2-3=x

KengaRu [80]

Answer:

x = -1, 1.5

Step-by-step explanation:

Step 1: Write out equation

2x² - 3 = x

Step 2: Subtract <em>x</em> on both sides

2x² - 3 - x = x - x

2x² - x - 3 = 0

Step 3: Factor

(2x - 3)(x + 1) = 0

Step 4: Find roots

2x - 3 = 0

2x = 3

x = 3/2 or 1.5

x + 1 = 0

x = -1

3 0

3 years ago