All categories

1 year ago

6(2x²-5) = [?] x = -3

Mathematics

2 answers:

Korvikt [17]1 year ago

5 0

Answer:

Step-by-step explanation:

plug in -3 as x

6(2(-3)^2-5)

6(2(9)-5)

6(18-5)

6(13)

r-ruslan [8.4K]1 year ago

5 0

Answer: 78

Step-by-Step Solution:

=> 6(2x² - 5) ; when x = -3

Substitute the value of ‘x’ :-

= 6(2x² - 5)
= 6(2(-3)² - 5)
= 6(2(9) - 5)
= 6(18 - 5)
= 6(13)
= 6 * 13
=> 78

You might be interested in

Express in the form n:1 Give n as a decimal 3:15

Mama L [17]

Answer:

0.2

Step-by-step explanation:

n:1=3:15

$\frac{n}{1} =\frac{3}{15} \\\\15n=3\\n=\frac{1}{5} \\n=0.2$

5 0

3 years ago

In triangle abc, if A=120 degrees, a=8 and b=3, then angle B=

CaHeK987 [17]

The angle of B is $\angle B=19^{\circ}$

Explanation:

It is given that $\angle A=120^{\circ}$ and $a=8, b=3$

To determine the $\angle B$ , let us use the law of sine formula.

Thus, we have,

$\frac{Sin A}{a} =\frac{Sin B}{b}$

Substituting the values in the formula, we have,

$\frac{Sin 120}{8} =\frac{Sin B}{3}$

Multiplying both sides by 3,we get,

$\frac{3(0.866)}{8} ={Sin B}$

Simplifying and dividing, we get,

$0.32475=Sin B$

Multiplying both sides by $\sin ^{-1}$ , we get,

$\sin ^{-1}(0.32475)=B$

Thus, $B=18.95^{\circ}=19^{\circ}$

Hence, The angle of B is $\angle B=19^{\circ}$

6 0

2 years ago

Which expression is equivalent

babunello [35]

Answer:i think its the second choice sorry if im wrong

Step-by-step explanation:

6 0

2 years ago

Please help me with this problem

Reil [10]

1:150 = 3: x

3 x 150 = 450

p mark branlist

7 0

2 years ago

21. What is the simplified form of the following expression? (1 point)

Andre45 [30]

Answer (6y – 42)

6(y – 7)

Explanation:

5 0

3 years ago