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2 years ago

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 3 less than half a number is 10 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

Read 2 more answers

Will mark brainly! 20 points please hurry and help!!

Nata [24]

The correct answer is number one, number four, and number five. Please park Brainliest if helpful. Thanks

6 0

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

Read 2 more answers

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 already on the x-axis.

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3 years ago