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3 years ago

X+6y=7 24y=-4x find x and y

Mathematics

2 answers:

antoniya [11.8K]3 years ago

7 0

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

y = − X/ 6 + 7/ 6

x = X − 7

Step-by-step explanation:

Y_Kistochka [10]3 years ago

6 0

No solution to this problem

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A circle has a radius r=3 and a center at (3,-5). what is the general form of the circle

Aleks [24]

Answer:

yes it would be so do that

Step-by-step explanation:

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3 years ago

Joseph needs 345 cement blocks to build a wall 40 cm thick. He needs 205 cement blocks to build a wall 25 cm thick. Each block c

IrinaVladis [17]

9514 1404 393

Answer:

$105

Step-by-step explanation:

The thicker wall takes 345 -205 = 140 more blocks. Each of those costs $0.75, so the added blocks will cost ...

140 × $0.75 = $105

The thicker wall will cost $105 more.

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3 years ago

PQR is a right angled triangle calculate the size of angle marked x

romanna [79]

Answer:

$\displaystyle x \approx 37.4^\circ$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Trigonometry

[Right Triangles Only] SOHCAHTOA
[Right Triangles Only] cosθ = adjacent over hypotenuse

Step-by-step explanation:

Step 1: Define

Angle θ = x

Adjacent Leg = 5.8

Hypotenuse = 7.3

Step 2: Solve for x

Substitute in variables [Cosine]: $\displaystyle cosx^\circ = \frac{5.8}{7.3}$
[Fraction] Divide: $\displaystyle cosx^\circ = 0.794521$
[Equality Property] Trig inverse: $\displaystyle x^\circ = cos^{-1}(0.794521)$
Evaluate trig inverse: $\displaystyle x = 37.39^\circ$
Round: $\displaystyle x \approx 37.4^\circ$

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3 years ago

Create a pattern with the rule n+3

gtnhenbr [62]

N + 3 simply means we are adding 3 to the number before. An example of such of a pattern would look like this:

3, 6, 9, 12

4, 7, 10, 13

5, 8, 11, 14

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2 years ago

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