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maw [93]
2 years ago
15

Jackie can clean a house in 6 hours. When Jackie and Veronica work together, they can clean a house in about

Mathematics
1 answer:
Digiron [165]2 years ago
3 0

Answer:

5.4 hr i think

Step-by-step explanation:

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PART A<br> 3 less than half a number is 10<br> Write an expression to represent this situation.
Ivan

Answer:

n/2 - 3 = 10 represents this situation

Step-by-step explanation:

Let the number be n.  Then:

n/2 - 3 = 10 represents this situation.

5 0
3 years ago
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Will mark brainly! 20 points please hurry and help!!
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The correct answer is number one, number four, and number five. Please park Brainliest if helpful. Thanks
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2 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
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There are 1200 students at silver lake middle school 700 Are eighth graders what percent of the students are in the eighth grade
Leni [432]
(700/1200)*100 = 58.33%, rounding to the nearest 10th of à percent we get 60%
7 0
3 years ago
Write the coordinates of the vertices after a reflection across the x-axis.
Stells [14]

Answer:

S' (-6, 6)

T' (2, 6)

U' (2, 0)

V' (-6, 0)

Step-by-step explanation:

To reflect the rectangle over the x-axis, think of it as flipping it over the x-axis. On the graph, count the units from V to S, it's 6 units. So, from the x-axis, count 6 units up from V. S would lie on -6, 6. Do the same for W to T. T would lie on (2, 6). The remaining coordinates U and V don't change because it is <em>already </em>on the x-axis. <em> </em>

6 0
3 years ago
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