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3 years ago

7

Your score 60, 70, 60, 80 on your first for quizzes in algebra. What do you need to get on your 5th test in order for your avera

ge on all 5 tests to be a 71?

1 answer:

mihalych1998 [28]3 years ago

4 0

Answer:

85

Step-by-step explanation:

60+60+70+80+85 = 355

355/5 = 71

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Read this statement: “If a triangle is isosceles, then it is equilateral.” What is the converse of the statement?

makkiz [27]

From the above statement that <span>“If a triangle is isosceles, then it is equilateral" the only thing i can conclude is </span>If a triangle is equilateral, then it is isosceles.

8 0

3 years ago

Read 2 more answers

Which expression is equivalent to (sin x + 1)(sin x − 1)? A. cos2x B. -cos2x C. cos2x + 1 D. cos2x − 1 E. -cos2x + 1

Semenov [28]

ANSWER

B.

$- \cos^{2} x$

EXPLANATION

The given expression is

(sin x + 1)(sin x − 1)

Note that:

$(x + 1)(x - 1) = {x}^{2} - 1$

This implies that,

$( \sin \: x + 1)( \sin \: x - 1) = \sin^{2} x - 1$

We can factor -1 on the right hand side to get,

$( \sin \: x + 1)( \sin \: x - 1) = - (1 - \sin^{2} x )$

Note that from the Pythagorean Identity

$1 - \sin^{2} x = \cos^{2} x$

We apply this identity to obtain:

$( \sin \: x + 1)( \sin \: x - 1) = - \cos^{2} x$

The correct choice is B

4 0

3 years ago

Find the possible value or values of n in the quadratic equation 2n2 – 7n + 6 = 0.

nika2105 [10]

$2n^2 - 7n + 6 = 0\\
2n^2-4n-3n+6=0\\
2n(n-2)-3(n-2)=0\\
(2n-3)(n-2)=0\\
n=\dfrac{3}{2} \vee n=2
$

8 0

3 years ago

Find the oth term of the geometric sequence 5, -25, 125,

maxonik [38]

Answer:

-625

Step-by-step explanation:

Here we are basically multiplying each term by -5. So if you want two more terms, you would go like this...

5 × -5 = -25

-25 × -5 = 125

125 × -5 = -625

-625 × -5 = 3125

and so on!!!

Hope it helps and mark it as Brainliest if possible!!! Good Luck!!!

8 0

3 years ago

One of the steps Misaki used to solve an equation is shown below.

kramer

Answer:

Distributive property

Step-by-step explanation:

The given equation is:

$2q(q+4)=10$

To solve this equation, we expand the left hand side using the distributive property to obtain:

$2q^2+8q=10$

That was exactly what Miskai did.

Therefore the property that justifies his step shown is the distributive property.

This property says that, if a, b, and c are real numbers then,

$a(b+c)=ab+bc$

4 0

3 years ago