All categories

3 years ago

3(2+7) - 9 x 7 = 3+8 x 2 x 2 - 4 = 16 ÷ 2 x 5 x 3 ÷ 6 = Please answer! ✨✨

Mathematics

1 answer:

Thepotemich [5.8K]3 years ago

3 0

Answer:

At first, we have 3 expressions that are equal.

$3(2+7) - 9 \cdot 7= 3+8 \cdot 2 \cdot 2 - 4$

$6+21 - 63= 3+32 - 4$

$-36=31$

$-36\neq 31$

This is not true.

You might be interested in

How much is 7 cups in pints<br> Write your answer as a whole or mixed number in simplest form

katrin [286]

The answer is: 3 1/2

8 0

3 years ago

1. find the exact value of cos2θ if sin 2θ=3/4 and θ is between 0° and 90°

musickatia [10]

Answer:

<u>Identities used:</u>

sin²θ + cos²θ = 1
cos2θ = cos²θ - sin²θ

sin2θ = 3/4, and θ in the first quadrant
cos²2θ = 1 - sin²2θ
cos2θ = √(1 - sin²2θ) = √(1 - 9/16) = √(7/16) = √7 / 4

sinθ(cos²θ - cos2θ) =
sinθ(cos²θ - (cos²θ - sin²θ) =
sinθ(sin²θ) =
sin³θ

5 0

3 years ago

Write the equation of the line that is parallel to the given segment and that passes through the point (-3,0).

grandymaker [24]

Answer:

Option (B)

Step-by-step explanation:

In the figure attached,

A straight line is passing through two points (0, 2) and (3, 1).

Slope of this line ( $m_1$ ) = $\frac{y_2-y_1}{x_2-x_1}$

= $\frac{2-1}{0-3}$

= $-\frac{1}{3}$

Let the slope of a parallel to the line given in the graph = $m_2$

By the property of parallel lines,

$m_1=m_2$

$m_2=-\frac{1}{3}$

Equation of a line passing through a point (x', y') and slope 'm' is,

y - y' = m(x - x')

Therefore, equation of the parallel line which passes through (-3, 0) and having slope = $-\frac{1}{3}$ will be,

$y-0=-\frac{1}{3}(x+3)$

$y=-\frac{1}{3}x-1$

Option (B). will be the answer.

5 0

3 years ago

Mr. Garcia notes that in 84% of the papers his former students have turned in, they cited their sources incorrectly. He plans to

Amanda [17]

Answer:

.022

Step-by-step explanation:

Answer on Khan

6 0

3 years ago

Chaney deposits $1435.73 into a savings account that pays a simple annual interest rate of 1.32%. How much interest will she ear

Aneli [31]

Answer:

Interest Chaney earns after 3 years is $56.85

Step-by-step explanation:

Given:

Amount deposited = $1435.73

Simple annual interest rate = 1.32% = 1.32/ 100 = 0.0132

To find: Interest after 3 years

We know that the formula to calculate the interest amount is

Simple interest (S.I.) = $\frac{Prt}{100}$

where,

P is the initial amount deposited

r is the rate of simple interest in percentage

t is the time in years for which interest is to be calculated

Substituting the known values in the formula, we get

S.I = $\frac{1435.73 x 1.32 x 3}{100}$

= 56.85

Hence the interest Chaney earns after 3 years is $56.85

8 0

3 years ago