All categories

3 years ago

(9a - 13)(3a + 11) Find a

Mathematics

2 answers:

Shkiper50 [21]3 years ago

4 0

The answer is 27a-2!!!!!!!!!!!!!

oksano4ka [1.4K]3 years ago

3 0

Answer:

the answer is 27 A.

Step-by-step explanation:

i hope it help!

You might be interested in

Solve for m<br> y - y₁ = m (x - x₁)

Nana76 [90]

Answer:

Step-by-step explanation:

divide the $x-x_{1}$ from the right side to isolate the m.

8 0

3 years ago

Computer battery A has 4/5 of its power remaining. Computer battery B has 9/20 of its power remaining. How much more power does

zhuklara [117]

Answer:

7/20

Step-by-step explanation:

GIven:

Battery A = 4/5 remaining

Battery B = 9/20 remaining

assuming both batteries are otherwise identical (except for charge level remaining), then,

Battery A - Battery B

= 4/5 - 9/20

we need to convert both fractions to same denominator to perform the subtraction easily. Note that the Least Common Multiple for 5 and 20 is 20, hence we convert both denominators to 20,

Battery A - Battery B

= 4/5 - 9/20

= (4/5) (4/4) - 9/20

= 16/20-9/20

= 7/20

7 0

3 years ago

Lorenzo needs to run 13 1/2 miles this week to meet his goal for his training plan. so far this week he has run 3 1/2 miles on m

Viefleur [7K]

Answer:5 more miles

Step-by-step explanation:

6 0

2 years ago

Find the area of the region under the graph of f on [a, b].<br> f(x) = x2 − 8x + 17; [−1, 2]

Harman [31]

Answer:

The area is 42 area units.

Step-by-step explanation:

The area of a function f(x) on an interval [a,b] is given by:

$A = \int\limits^a_b {f(x)} \, dx$

Applying to this question:

$A = \int\limits^-1_2 {x^2 - 8x + 17} \, dx$

Then

$F(x) = \frac{x^{3}}{3} - 4x^{2} + 17x$

$A = F(2) - F(-1)$

$F(2) = frac{2^{3}}{3} - 4*2^{2} + 17*2 = \frac{8}{3} + 18 = \frac{8 + 3*18}{3} = \frac{62}[3}$

$F(-1) = frac{(-1)^{3}}{3} - 4*(-1)^{2} + 17*(-1) = -\frac{1}{3} - 21 = \frac{-1 - 21*3}{3} = -\frac{64}[3}$

$A = F(2) - F(-1) = \frac{62}[3} - (-\frac{64}[3}) = \frac{62+64}{3} = 42$

The area is 42 area units.

5 0

3 years ago

It takes you 12 minutes

tester [92]

Answer:

48 minutes

Step-by-step explanation:

$\frac{1}{5} x = 12$

$x = 60$

$60 - 12 = 48$

It will take 48 more minutes to finish raking the backyard.

6 0

2 years ago