All categories

2 years ago

Which expressions are equivalent to 4^-2 times 7^-2

Mathematics

1 answer:

Harlamova29_29 [7]2 years ago

7 0

Step-by-step explanation:

$= {4}^{ - 2} \times {7}^{ - 2}$

$= {(4 \times 7)}^{ - 2}$

$= {28}^{ - 2}$

$= \frac{1}{ {28}^{2} }$

You might be interested in

Find the measure of А E 103° 270 50° 35° D B C

Orlov [11]

Answer:B

Step-by-step explanation:

3 0

2 years ago

Set up a proportion. What is h?

Ulleksa [173]

Answer:

Decimal:

h = 4.2 ft

Fraction:

$h=4\frac{1}{5}$ ft

Step-by-step explanation:

$\frac{9}{15} :\frac{h}{7}$

Cross multiply.

h · 15 = 9 · 7

Simplify.

15h = 63

Divide each side by 15.

15h ÷ 15 = 63 ÷ 15

Simplify.

h = 4.2

3 0

2 years ago

How much would you make for one month (4 weeks) if you worked a 40 hour week?

Anon25 [30]

Answer:

Unclear

Step-by-step explanation:

I believe we need more information to solve the problem!

We currently have:

a = b

b = total amount for 40 hours

As you can see, we cannot solve this. For a we would need something like how much you make per week, etc!

7 0

2 years ago

Read 2 more answers

Graph a line with a slope of 1/4 that contains the point (6, 3).

Semenov [28]

Answer:

The graph in the attached figure

Step-by-step explanation:

we know that

The equation of a line in point slope form is

$y-y1=m(x-x1)$

we have

$(x_1,y_1)=(6,3)$

$m=\frac{1}{4}$

substitute

$y-3=\frac{1}{4}(x-6)$

The easiest way to graph a line is to calculate the intercepts

The x-intercept is the value of x when the value of y is equal to zero

For y=0

$0-3=\frac{1}{4}(x-6)$

$-12=(x-6)$

$x=-12+6=-6$

The x-intercept is the point (-6,0)

The y-intercept is the value of y when the value of x is equal to zero

For x=0

$y-3=\frac{1}{4}(0-6)$

$y-3=-\frac{3}{2}$

$y=-\frac{3}{2}+3$

$y=1.5$

The y-intercept is the point (0,1.5)

Plot the intercepts and join the points to graph the line

(-6,0) and (0,1.5)

The graph in the attached figure

8 0

2 years ago

Simplify: (x + 7)(x-4) A. 2r +3 B. 12-28 C. x2-3x - 28 D. x2 + 3x - 28

jeka57 [31]

Answer:

(x + 7)(x - 4) = x2 - 4x + 7x - 28 = x2 + 3x - 28

7 0

2 years ago