All categories

3 years ago

Anna said that that the product of 7/8 times 1 1/2 =7/2 how can you tell that her answer is wrong?

1 answer:

5 0

To multiple fractions, you multiply numerator x numerator, then denominator x denominator. in this example, first convert 1 1/2 to an improper fraction. it will become 3/2. for this equation, you next multiply. so, (7x3)/(8x2). this simplified to 21 over 16. Anna's mistake is that she multiplied 7 x 1/2 rather than 7/8 x 1 1/12

You might be interested in

Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

aliina [53]

Answer:

Step-by-step explanation:

Solve 5 to the power of x minus 3 to the power of x when x=2.

So, you do 5 to the power of 2 minus 3 to the power of 2, which is 25-9=16

8 0

3 years ago

Read 2 more answers

What are the domain and range of the relation (–4, 2), (0, 1), (0, 5), (8, 10)?

inysia [295]

C.

<span>Domain: {–4, 0, 8}; Range: {2, 1, 5, 10}

In the domain, there can only be values for which is possible for.
Like There is no 5 for the domain, because there is no x like that.

Hope this helps :)</span>

8 0

3 years ago

Read 2 more answers

Assume that they all agree on the sample size and the sample mean use the pairs below to select the team that has the smallest s

Archy [21]

Step-by-step explanation:

A.Confidence Level: 99.7%; Confidence Interval: 42 to 48

B.Confidence Level: 95%; Confidence Interval: 43 to 47

C.Confidence Level: 68%; Confidence Interval: 44 to 46

D.Confidence Level: 95%; Confidence Interval: 44 to 46

6 0

2 years ago

A fighter tank targets an enemy helicopter flying at an altitude of 1250 ft. If the ground

madam [21]

By using trigonometric relations, we will see that the angle of elevation must be 55°.

<h3>How to find the angle of elevation?</h3>

We can see this as a right triangle, where one cathetus measures 1250ft (altitude) and the other cathetus measures 875ft.

The angle of elevation is the angle such that the adjacent cathetus is the one measuring 875ft.

Then we can use the relation:

tan(a) = (opposite cathetus)/(adjacent cathetus)

tan(a) = 1250ft/875ft

To find the angle of elevation, we can use the inverse tangent function:

a = Atan(1250ft/875ft) = 55°

The angle of elevation must be 55 degrees.

If you want to learn more about right triangles:

brainly.com/question/2217700

#SPJ1

7 0

2 years ago

Given the trinomial, what is the value of the coefficient B in the factored form? 2x2 + 4xy − 48y2 = 2(x + By)(x − 4y) −12 12 −6

Sonja [21]

Answer:

B is 6.

Step-by-step explanation:

We are trying to find a value for $B$ such that:

$2x^2+4xy-48y^2=2(x+By)(x-4y)$ is true for every $x,y$ .

So let's choose $x=0,y=1$ :

$2(0)^2+4(0)(1)-48(1)^2=2(0+B(1))(0-4(1))$

$2(0)+0-48=2(B)(-4)$

$0-48=-8B$

$-48=-8B$

Divide both sides by -8:

$\frac{-48}{-8}=B$

$6=B$

$B=6$

Note: I didn't want to choose y to be 0 because the value of B would disappear from the equation. So you should be able to have chosen any x and y except for y=0 to solve the equation for B.

Check:

So let's check and use foil to multiply out the right hand side.

$(x+6y)(x-4y)$