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3 years ago

Y = 2x + 4 y = 3x + 6 Solve for x

Mathematics

1 answer:

alexandr402 [8]3 years ago

4 0

Answer:

(-2,0)

Step-by-step explanation:

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What is the area of this figure?

coldgirl [10]

Answer: 102

-----------------------------------------------

We'll use the formula
A = h*(b1+b2)/2
where
A = area of trapezoid
h = height
b1 & b2 are the parallel bases

In this case,
b1 = 6+7 = 13
b2 = 21
h = 6

Making the area to be
A = h*(b1+b2)/2
A = 6*(13+21)/2
A = 6*(34)/2
A = 204/2
A = 102

Side Note: We don't use the slanted side of 10 cm at all

3 0

4 years ago

I need help on this please

Eduardwww [97]

Answer:

a= k=15 c= m=48/7

Step-by-step explanation:

for a.

first, collect like terms. calculate.

2k- 10 = 20

move the constant to the right (10)

2k = 20 + 10

2k = 30

divide both sides.

k= 15.

for c.

first calculate.

12= 3m - 2/3m - 4

multiple both sides.

36= 9m - 2m - 12

collect like terms.

36= 7m - 12

move like terms.

-7m= - 12 - 36

calculate.

-7m= - 48

divide both sides.

m=48/7

hope this was helpful!

7 0

3 years ago

Solve the Equation

Alexandra [31]

Answer:

The answer is letter D

Step-by-step explanation:

see the picture please

4 0

3 years ago

Deron recorded his heart rate as 204 beats in 3 minutes. What is the unit rate in beats per minute?

Reika [66]

204/3 = 68
68 beats per minute

7 0

3 years ago

Read 2 more answers

A distance AB is observed repeatedly using the same equipment and procedures, and the results, in meters, are listed below: 67.4

skad [1K]

Answer:

a) $\bar X =\frac{67.401+67.400+67.402+67.396+67.406+67.401+67.396+67.401+67.405+67.404}{10}=67.401$

b) The sample deviation is calculated from the following formula:

$s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And for this case after replace the values and with the sample mean already calculated we got:

$s=0.0036$

If we assume that the data represent a population then the standard deviation would be given by:

$\sigma=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And then the deviation would be:

$\sigma =0.00319$

Step-by-step explanation:

For this case we have the following dataset:

67.401, 67.400, 67.402, 67.396, 67.406, 67.401, 67.396, 67.401, 67.405, and 67.404

Part a: Determine the most probable value.

For this case the most probably value would be the sample mean given by this formula:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}$

And if we replace we got:

$\bar X =\frac{67.401+67.400+67.402+67.396+67.406+67.401+67.396+67.401+67.405+67.404}{10}=67.401$

Part b: Determine the standard deviation

The sample deviation is calculated from the following formula:

$s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And for this case after replace the values and with the sample mean already calculated we got:

$s=0.0036$

If we assume that the data represent a population then the standard deviation would be given by:

$\sigma=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And then the deviation would be:

$\sigma =0.00319$

3 0

4 years ago