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3 years ago

I don't understand how this works

Mathematics

1 answer:

Bingel [31]3 years ago

8 0

Answer:

The commutive property used twice, once on each of the two multiplication

The commutive property is where you can be able to switch around the numbers to multiply the problem to get your solution.

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Please Help. 50 points.

lara [203]

Answer:

They are both right angles and they both have a measure of 28°.

Step-by-step explanation:

angle A and angle B are both right angles (90°), and they both have a side measuring 28°. For the missing sides of both the measurement should be 62°.

8 0

3 years ago

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An employee worked 36 hours last week. This week, she worked 48 hours. Find the percent increase. Round to the nearest percent.

ioda

Answer:

There was a 25% increase.

Step-by-step explanation:

6 0

3 years ago

Can somebody tell me what the answer to y-13=8 is? Please and thank you.

makvit [3.9K]

Answer:

Y=21

Step-by-step explanation:

add 13 on both sides you get Y=21

4 0

2 years ago

Two fifths of the children in the nursery were boys. What was the ratio of boys to girls in the nursery?

Shtirlitz [24]

The answer would be 2:3

6 0

3 years ago

Substitute the values for a, b, and c into b2 – 4ac to determine the discriminant. Which quadratic equations will have two real

hoa [83]

Answer: $0=2x^2-7x-9\\0=4x^2-3x-1\\0=x^2-2x-8$

Step-by-step explanation:

We know that the standard quadratic equation is ax^2+bx+c=0

Let's compare all the given equation to it and , find discriminant.

1. a=2, b= -7, c=-9

$b^2-4ac=(-7)^2-4(2)(-9)=49+72>0$

So it has 2 real number solutions.

2. a=1, b=-4, c=4

$b^2-4ac=(-4)^2-4(1)(4)=16-16=0$

So it has only 1 real number solution.

3. a=4, b=-3, c=-1

$b^2-4ac=(-3)^2-4(4)(-1)=9+16=25>0$

So it has 2 real number solutions.

4. a=1, b=-2, c=-8

$b^2-4ac=(-2)^2-4(1)(-8)=4+32=36>0$

So it has 2 real number solutions.

5. a=3, b=5, c=3

$b^2-4ac=(5)^2-4(3)(3)=25-36=-9$

Thus it does not has real solutions.

5 0

3 years ago

Read 2 more answers