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2 years ago

Simplify (92 – 3 × 7) ÷ (7 – 3)

Mathematics

2 answers:

Illusion [34]2 years ago

8 0

Answer:

17 3/4

Step-by-step explanation:

Equation: (92 - 3*7)/(7-3)

PEMDAS so parenthesis first. Then multiplication so 7 times 3 is 21. For 7 minus 3 would be four. Like this: (92-21)/4

Subtraction: 71/4

Answer: 17 3/4

Bas_tet [7]2 years ago

6 0

Answer:

17.75

Step-by-step explanation:

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Betty baked 3 cakes in 4 hours 12. Minutes how long did it take her to bake 1

Murljashka [212]

Answer:

It took Betty 1 hour 24 minutes to bake 1 cake.

Step-by-step explanation:

1) Convert to minutes. 4 hours 12 minutes = 252 minutes

2) Divide by 3 (number of cakes). 252 minutes divided by 3 is equivalent to 1 hour 24 minutes or 84 minutes.

7 0

3 years ago

Write the equation of a line that is perpendicular to the given line and that passes through the given point. -x+5y=14; (-5,-2)

Vlad1618 [11]

$Let\\\\k:y=m_1x+b_1\\\\l:y=m_2x+b_2\\\\l\ \perp\ k\iff m_1m_2=-1\\\\\text{We have}\ k:-x+5y=14\qquad|+x\\\\5y=x+14\qquad|:5\\\\y=\dfrac{1}{5}x+\dfrac{14}{5}\to m_1=\dfrac{1}{5}\\\\l:y=mx+b\to\dfrac{1}{5}m=-1\qquad|\cdot5\\\\m=-5\\\\l:y=-5x+b\\\\\text{Put the coordinates of the point (-5, -2) to the equation of the line}\ l:\\\\-2=-5(-5)+b\\-2=25+b\qquad|-25\\b=-27\\\\Answer:\ y=-5x-27\to5x+y=-27$

3 0

2 years ago

Write an equation of a line with the given slope and y-intercept. slope: - 13 y-intercept: –1

Naddik [55]

Answer:

y = -13x - 1

General Formulas and Concepts:

Algebra I

Slope-Intercept Form: y = mx + b

m - slope
b - y-intercept

Step-by-step explanation:

Step 1: Define

Identify variables

Slope m = -13

y-intercept b = -1

Step 2: Find Equation

Substitute in variables [Slope-Intercept Form]: y = -13x + -1
Simplify: y = -13x - 1

8 0

3 years ago

Directions: Solve I think you cross multiply but I'm not really sure where to go from there.

Vlada [557]

I'm fairly sure they want you to cross multiply then graph. This will give you 'zeroes' which are solutions for x
if you graph (4x^3+3x^2)= z it'll give you a zero at -0.75 which means x= -3/4

7 0

3 years ago

Which expression is equivalent to

KonstantinChe [14]

Given the expression:

$\sqrt[4]{ \frac{24x^{6}y}{128x^{4}y^{5}}}$

Simplifying:

$\sqrt[4]{ \frac{3x^{2}}{16y^{4}}}$

Then the answer is:

$\frac{ \sqrt[4]{3x^{2}}}{2y}$

6 0

2 years ago