All categories

3 years ago

PLS HELP ME WITH 3! THANK YIU SO MUCH!! (Random answers gets moderated.)

Mathematics

1 answer:

kirill115 [55]3 years ago

8 0

$6 {x}^{2} - 7x - 5 \\ 6 {x }^{2} + 3x - 10x - 5$
$3x(2x + 1) - 5(2x + 1) \\ (3x - 5)(2x + 1)$

You might be interested in

Find the area of a circle with a diameter of 6.8 feet

Maksim231197 [3]

Answer:

The area of a circle with diameter 6.8 is 36.32

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What is the step method to find gcf of 28 and 42

Yuliya22 [10]

First, try multiplying multiple numbers to see if you get these numbers.
2=4,6,8,10,12,14,16,18,20,22,24,26,(28),30,32,34,36,38,40,(42)
7=7,14,21,(28),35,(42)
14= 14,(28),(42)
14, would be best; Alternatively, the GCF of 28 and 42 can be found using the prime factorization of 28 and 42.
-The factors of 28 are 28, 14, 7, 4, 2, 1.
-The factors of 42 are 42, 21, 14, 7, 6, 3, 2, 1.
Common numbers: 1 , 2, 7,14 , the largest number that can go into both is 14.

7 0

3 years ago

I would love a little help

ANEK [815]

Step-by-step explanation:

36A) AB = 4/ sin 30° = 4/ 0.5 = 8 cm

36B) AC = 4/ tan 30° = 4/ 0.577 = 6.9 cm

36C) BD = 4/sin 45° = 4/ 0.707 = 5.7 cm

36D) area of ∆ABC = ½×6.9×4= 13.8 cm²

36E) sin A = sin 30° = 0.5

7 0

3 years ago

If c= 8 what is the value of 4c + ( 4-3) Also, if t= 5, what is the value of 16-3t?

lions [1.4K]

The first answer is 33.
And secomd one is 1.

6 0

3 years ago

Read 2 more answers

Jonathan was laying on the ground and enjoying the shade but now the sun is shining

avanturin [10]

Answer:

38.5°

Step-by-step explanation:

Given that the height of the building is 8 yard and the distance between Jonathan and the building is 10 yards.

The sun is at the top of the building, let the distance between Jonathan laying on the ground and the top of the building be x. Using Pythagoras:

x² = 10² + 8²

x² = 100 + 64

x² = 164

x = √164 = 12.86 yards

For a triangle with sides a, b, c and their respective opposite angles A, B, and C. The sine rule is given as:

$\frac{a}{sin(A)} =\frac{b}{sin(B)}=\frac{c}{sin(C)}$

Let the angle that the sunlight hit the ground be y°. The andle between the building and the ground is 90°. Therefore using sine rule:

$\frac{8}{sin(y)}=\frac{12.86}{sin(90)}\\\\sin(y)=\frac{8*sin(90)}{12.86}\\\\sin(y)=0.622\\\\y=sin^{-1}0.622\\\\y = 38.5^0$

6 0

3 years ago