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Lunna [17]
3 years ago
14

State whether each equation is true or false 2(4+5)=13

Mathematics
2 answers:
Mandarinka [93]3 years ago
5 0
2(4+5)
2(9)
18

18 does not equal 13.
Final answer: False

Remember to solve by working within parentheses first according to the order of operations.
Sergeeva-Olga [200]3 years ago
4 0
False 2(4+5)=13 equal 18
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Radius of cylinder = 5 cm
Kisachek [45]

Answer:

C  1055 04 cm

Step-by-step explanation:

We don't need to see the figure, since we know for sure the cone fits into the cylinder (smaller diameter and height).

So, we first need to calculate the volume of the cylinder, which is given by the formula:

VT = π * r² * h

VT = 3.14 * 5² * 16 = 3.14 * 400 = 1,256 cubic cm

Then we calculate the volume of the cone, which is given by:

VC = (π * r² * h)/3

VC = (3.14 * 4² * 12)/3 = (3.14 * 192)/3 = 200.96 cu cm

Then we calculate the void space left inside the cylinder by subtracting the volume of the cone from the volume of the cylinder:

NV = VT - VC = 1,256 - 200.96 = 1,055.04 cu cm

7 0
3 years ago
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Original price: $66; Markup: 20% The retail price is ?
andrezito [222]

Answer:

$79.20

Step-by-step explanation:

20% of $66 = $13.20

$66 + $13.20 = $79.20

4 0
3 years ago
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0. What are the means of the following proportion? 3⁄15 = 12⁄60 A. 15 and 12 B. 3 and 15 C. 3 and 60 D. 12 and 60
Neko [114]

3 and 60." The means of the proportion is 15 and 12.


4 0
3 years ago
Jane wishes to bake an apple pie for dessert. The baking instructions say that she should bake the pie in an oven at a constant
pychu [463]

Answer:

A=152

K= -Ln(0.5)/14

Step-by-step explanation:

You can obtain two equations with the given information:

T(14 minutes) = 114◦C

T(28 minutes)=152◦C

Therefore, you have to replace t=14, T=114 and t=28, T=152 in the given equation:

114=190-Ae^{-14k} (I) \\152=190-Ae^{-28k}(II)

Applying the following property of exponentials numbers in (II):

e^{a}.e^{b}=e^{a+b}

Therefore e^{-28k} can be written as e^{-14k}.e^{-14k}

152=190-Ae^{-14k}.e^{14k}

Replacing (I) in the previous equation:

152=190-76e^{-14k}

Solving for k:

Subtracting 190 both sides, dividing by -76:

0.5=e^{-14k}

Applying the base e logarithm both sides:

Ln(0.5)= -14k

Dividing by -14:

k= -Ln(0.5)/14

Replacing k in (I) and solving for A:

Ae^{-14(-Ln(0.5)/14)}=76\\Ae^{Ln(0.5)} =76\\A(0.5)=76

Dividing by 0.5

A=152

7 0
3 years ago
Which equations represent circles that have a diameter of 12 units and a center that lies on the y-axis? Select two options
Sholpan [36]

Answer:

The answer is A and E

x2+(y−3)2=36

x^{2}+(y+8)^{2}=36x2+(y+8)2=36

4 0
3 years ago
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