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2 years ago

6

a test has 40 questions. denise finished 2/5 of the questions in the first 10 minutes and 1/2 of the remaining questions in the

next 15 minutes. how many questions had denise answered after 25 minutes?

1 answer:

timofeeve [1]2 years ago

3 0

That would be 28 questions. Hope I helped!

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Please help me Solve -2a -5>3

worty [1.4K]

Answer:

a < -4

Step-by-step explanation:

Step 1: Write out inequality

-2a - 5 > 3

Step 2: Add 5 to both sides

-2a > 8

Step 3: Divide both sides by -2

a < -4

Here, we can see that any value of <em>a </em>less than -4 works. So <em>a</em> could be -124 or -5, or even -1271293587923857 and it would work.

4 0

2 years ago

Solve for x: 3(x + 1) = −2(x − 1) − 4<br><br> 1<br><br> −1<br><br> −5<br><br> −25

LekaFEV [45]

Answer:

x = - 1

Step-by-step explanation:

3(x + 1) = - 2(x - 1) - 4 ← distribute parenthesis on both sides

3x + 3 = - 2x + 2 - 4

3x + 3 = - 2x - 2 ( add 2x to both sides )

5x + 3 = - 2 ( subtract 3 from both sides )

5x = - 5 ( divide both sides by 5 )

x = - 1

7 0

1 year ago

At which values of x does the graph of f(x)=x^2-x-2/(x^2-1)(x^2-16) have a vertical asymptote? Check all that apply

pychu [463]

vertical asymptotes: x=-4 , x=1 , x=4

6 0

2 years ago

Read 2 more answers

Cobalt-60 has an annual decay rate of about 13%.

melomori [17]

The answer will be c

3 0

2 years ago

Read 2 more answers

Write the equation of the parabola in vertex form. <br><br> Vertex (1,2) point (2,-4)

lozanna [386]

Answer:

$f(x)=6(x-2)^2-4$

Step-by-step explanation:

The equation in vertex form is

$f(x)=a(x-2)^2 - 4$

Substituting in the coordinates (1,2) to find a,

$2=a(1-2)^2 - 4 \\ \\ 2=a-4 \\ \\ a=6 \\ \\ \therefore f(x)=6(x-2)^2-4$

8 0

1 year ago