3 years ago

Please help me with pre algebra I’ll give brainlist

Mathematics

1 answer:

MArishka [77]3 years ago

8 0

Here you go, it’s in order!

B+7
2b-3
5b
B-6

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What is the factorization of the trinomial below?

mart [117]

Answer:

D. x(x - 7)(x - 5).

Step-by-step explanation:

x3 - 12x2 + 35x

= x(x^2 - 12x + 35)

= x(x - 7)(x - 5).

8 0

4 years ago

If 2/x+ 3/y =13 and 5/x- 4/y = -2, then x+y equals

creativ13 [48]

Answer:

$x + y = \frac{5}{6}$

Step-by-step explanation:

Let:

$u = \frac{1}{x} \\ v = \frac{1}{y}$

This allows us to manipulate the equations like we normally would.

$2u + 3v = 13 \\ 5u - 4v = - 2 \\ \\ + 8u + 12v = 52 \\ + 15u - 12v = - 6 \\ 23u = 46 \\ u = 2 \\ \\ 2(2) + 3v = 13 \\ 4 + 3v = 13 \\ 3v = 9 \\ v = 3$

Then, we return the values where they belong.

$u = \frac{1}{x} \\ 2 = \frac{1}{x} \\ x = \frac{1}{2} \\ \\ v = \frac{1}{y} \\ 3 = \frac{1}{y} \\ y = \frac{1}{3}$

Finally, we add:

$\frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6}$

7 0

3 years ago

the height of an equivalent triangle is 15cm and it's perimeter is 36cm find the area of the triangle

OlgaM077 [116]

Answer:

The area is 72 cm².

Step-by-step explanation:

Since it is equivalent triangle

h = b

so,

b + b + b (since all sides are equal)= 36 cm

3b = 36 cm

or, b = 36/3

so, b = 12 cm

area of triangle = (1/2)×b×h

= (1/2)×12cm×12cm

= 6cm × 12cm

= 72 cm²

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3 years ago

Jeff ran 2 miles in 12 minutes. Ju Chan ran 3 miles in 18 minutes. Did Jeff and Ju Chan run the same number of miles per minute?

kenny6666 [7]

12/2=6mpm 18/3=6mpm yes they ran at the same rate

4 0

4 years ago

Read 2 more answers

Find the value of [-3/7] raised to the power -2<br><br> and (3) raised to the power -4

xenn [34]

(3)^-4 = 0.01234567901
(-3/7)^-2 = <span>5.44444444444</span>

7 0

3 years ago