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3 years ago

GIVING AWAY BRAINLY!!

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

6 0

The answer is B.) 40x-16

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Use the distributive property to write each expression then evaluate it 7(7-9)

valkas [14]

Answer:

49-63

Step-by-step explanation:

1. (7·7) - (7·9)

2. (49) - (63)

3. 49 - 63 = -14

Hoped I helped!! :)

8 0

3 years ago

Read 2 more answers

It takes the high-speed train x hours to travel the z miles from Town A to Town B at a constant rate, while it takes the regular

tatyana61 [14]

Answer:

S= z (y-x)/(x+y)

Step-by-step explanation:

Lets the speed of high speed train = u

Lets the regular speed train = v

We know that

Distance = Speed x time

For high speed train

z = u .x

u= z/x ----------1

For regular speed train

z = v .y

v = z/y -------------2

Both are traveling in opposite direction so relative speed

Vr = z / x+ z /y

Lets in time t they will meet

z = (z / x+ z /y) t

t= xy/ (x+y)

Lets take distance cover by high speed train is m when it moves A to B and speed cover by regular train is n when it is moving B to A.They meet at time t.

m = u .t

m = z / x .xy/ (x+y)

m = zy/ (x+y) -----------3

n = v .t

n = z / y .xy/ (x+y)

n = zx/ (x+y) -----------4

From equation 3 and 4

m - n= zy/ (x+y) - zx/ (x+y)

S= z (y-x)/(x+y)

Option a is correct.

4 0

3 years ago

Choose the slope-intercept form of 3x + 2y = 5

wlad13 [49]

Answer:

y = -3/2x + 5/2

Step-by-step explanation:

slope intercept form is y = mx + b

so we have to solve the equation for y

2y = 5 - 3x

y = 5/2 -3/2x

y = -3/2x + 5/2

8 0

3 years ago

A new television set was recently purchased for the common room in a Residence Hall for $428.00 including tax. If the tax rate i

prohojiy [21]

The price of the television set before taxes is $400

<h3>How to find the price of the television set before taxes.?</h3>

The given parameters are:

Price after tax = $428.00

Tax rate = 7%

The price of the television set before taxes is calculated as:

Price after tax = Price before tax * (1 + tax rate)

This gives

$428.00 = Price before tax * (1 + 7%)

Express the percentage as decimal

$428.00 = Price before tax * (1 + 0.07)

Evaluate the sum

$428.00 = Price before tax * (1.07)

Divide both sides by 1.07

Price before tax = $400

Hence, the price of the television set before taxes is $400