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3 years ago

Can someone help me please?

Mathematics

2 answers:

Andreas93 [3]3 years ago

7 0

She put the y in the same equation ....it was the mistake
She had to put the y in the other equation:
2x+ 22 - 10x = - 2
-8x + 22 = - 2
-8x= -2 - 22
-8x= - 24
x= 3

IrinaVladis [17]3 years ago

5 0

Answer:

Marta solved for y in the first equation and then substituted it back into that equation instead of the other one!

Step-by-step explanation:

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Find the area and the circumference of a circle with diameter 4 yd.

MAVERICK [17]

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

C≈12.57 yd

A≈12.57 yd²

4 0

3 years ago

Give an example of a counting problem where 2^5 - 1 is the solution. Explain why you must subtract 1.

nekit [7.7K]

Answer:

Suppose a problem of the form:

A person can choose:

1 out of 2 pants (red or blue)

1 out of 2 shirts (red or blue)

1 out of 2 pairs of shoes (red or blue)

1 out of 2 socks (red or blue)

1 out of 2 hats (red or blue)

Ok,

We have 5 selections with 2 options each, so the number of combinations is:

2^5

Now let's add another restriction, the person can not wear all red clothes, the person must have at least one blue one.

So we removed the combination where the person selects all red clothes, which means that we removed one combination.

So now, the total number of possible combinations is the number that we got before minus one:

2^5 - 1

Notice that subtracting the one is necessary, we first use the math that we know to find the total number of combinations and then we look at the restrictions to remove the restricted combination.

Then the complete problem is:

A person can choose:

1 out of 2 pants (red or blue)

1 out of 2 shirts (red or blue)

1 out of 2 pairs of shoes (red or blue)

1 out of 2 socks (red or blue)

1 out of 2 hats (red or blue)

And the person can not wear all red clothes, the person must have at least one blue one.

How many different combinations there are?

3 0

3 years ago

1- A soma de dois números é 1620 e a diferença entre eles e 740.Quais são esses números?

Vladimir79 [104]

Os números são 1180 e 440. <span>¡Espero que esto ayude!</span>

8 0

4 years ago

Simplify the expression 6 + (12 + x).<br> 6+ (12 + x) = 0<br> I really need helppp

Alex73 [517]

Answer: x= -63/4, 15 3/4 or 15.75 in decimal form

Step-by-step explanation: Symbolab is a good calculator

5 0

3 years ago

Please help I dont understand

Anastasy [175]

Answer:

Angle 2=160

Angle 3=10

Step-by-step explanation:

The rhombus is made up of two isoceles triangle.

Angle 1 measures 160.

Since the triangle is a isoceles triangle, the opposite angles of the congruent sides is equal angles to each other.

So the reamaing angles in the top triangle are equal so we can use this equation

Remeber that triangle maximum degree it can hold is 180

$160 + x + x = 180$

$160 + 2x = 180$

$2x = 20$

$x = 10$

We have two congruent triangle side they share Three sides. SSS

This means the corresponding angle of Angle 1 is Angle 2.

Angle 2=Angle 1 by CPCTC.

Angle 2=160

Angle 3 corresponds with one of the remaining congruent angles so it measures

10.

8 0

3 years ago