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3 years ago

Math. I NEED HELP. PLZ. I don't understand!

Mathematics

1 answer:

tatyana61 [14]3 years ago

6 0

You plot the points and use the distance formula to find the length of the lines between the points. Distance formula: d= $\sqrt{(}x_{2} -x_{1} )^2 + (}y_{2} -y_{1} )^2\\$

Then use the pythagorean theorem with the sides, (C^2=A^2+B^2, c=longest side) if the equation works then it is a right triangle.

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URGENT!!! PLEASE HELP

Salsk061 [2.6K]

Answer:

c is 30.

The angles, from left to right, are:

66, 94, and 20.

Step-by-step explanation:

The three angles form a straight angle. In other words, they sum to 180. So, we can write the following equation:

$(2c+6)+(3c+4)+(\frac{1}{2}c+5)=180$

Let's solve for c. Combine like terms:

$(2c+3c+0.5c)+(6+4+5)=180$

Add:

$5.5c+15=180$

Subtract 15 from both sides:

$5.5c=165$

Divide both sides by 5.5:

$c=30$

So, the value of c is 30.

Now, substitute it into each of the angles to find their respective measures.

Left-Most Angle:

We have:

$2c+6$

Substitute 30 for c. This yields:

$=2(30)+6$

Multiply and add:

$=60+6=66$

Middle Angle:

We have:

$3c+4$

Substitute 30 for c:

$=3(30)+4$

Multiply and add:

$=90+4=94$

Right-Most Angle:

We have:

$\frac{1}{2}c+5$

Substitute 30 for c:

$=\frac{1}{2}(30)+5$

Multiply and add:

$=15+5=20$

So, our angles, from left to right, are: 66, 94, and 20.

And the value of c is 30.

And we're done!

3 0

3 years ago

Dose 8 has more factors or 9

Doss [256]

Answer:

Factors for 8: 1, 2, 4, 8

Factors for 9: 1, 3, 9

So 8 has more factors

7 0

3 years ago

superstore and cheap store are two supermarkets that sell boxes of the same type of cereal each supermarket has a special offer

Lena [83]

Answer:

Step-by-step explanation:

Cheapstore:

500p÷10=50p×2=100p or £1

£4=600g

Superstore:

600g÷10=60g×3=180g+600g

£5=780g

600÷4=150g per pound

780÷5=156g per pound

The box from Superstore is best value

8 0

3 years ago

Susan is looking to hire a cleaning company to clean her house every week. One cleaning company's cost can be calculated by the

kirill [66]

Answer:

Step-by-step explanation:

If one cleaning company's cost can be calculated by the expression 75 + 50x, where x is the amount of hours they spend cleaning and another cleaning company's cost can be calculated using the expression 50 + 75x, then to calculate how long each company will have to clean to cost the same amount, we will equate both expression of the company cost and solve for x as shown;

On equating:

75 + 50x, = 75x + 50

collect like terms'

50x-75x = 50-75

-25x = -25

divide both sides by -25

-25x/-25 = -25/-25

x = 1

hence the number of hours each company will have to clean to cost the same amount is 1 hour

3 0

3 years ago

Please sketch graph of the function f(x) = |x+2|.

Burka [1]

Answer:

The absolute value can be graphed using the points around the vertex (-2, 0), (-4, 2), (-3, 1), (-1, 1), (0, 2).

Step-by-step explanation:

The find the x coordinate of the vertex, set the inside of the absolute value x + 2 equal to 0. In this case, x + 2 = 0.

x + 2 = 0

Subtract 2 from both sides of the equation.

x = -2

Replace the variable x with -2 in the expression.

y = |(-2) + 2|

The absolute value vertex is (-2, 0).

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

For each x value, there is on y value. Select few z values from the domain. It would be more useful to select the values so that they are around the x value of the absolute value vertex.

Substitute the x value -4 into f(x) = |x+2|. In this case, the point is (-4,2).

y=2

Substitute the x value -3 into f(x) = |x+2|. In this case, the point is (-3,1).

y=1

Substitute the x value 0 into f(x) = |x+2|. In this case, the point is (0,2).

y=2

You can find the graph in the attachment.

6 0

3 years ago