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4 years ago

How do I solve this problem ?4x+7y=42 when X=9

Mathematics

2 answers:

schepotkina [342]4 years ago

8 0

Y
=
6
7. I think that's the answer

Rufina [12.5K]4 years ago

5 0

First you would plug in the 9 for x, then you would try to solve for y

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Gabriella bought 8 chicken wings for $4. What was the cost of the wings in wings per dollar?

Dmitriy789 [7]

Answer:

2 wings/dollar

Step-by-step explanation:

The unit cost is $4 / 8 wings, or $0.50/wing. This is equivalent to 2 wings/dollar.

5 0

3 years ago

Miranda needs to cut strips of paper that are 1/8 of an inch. If she has piece of paper that is 7 and 3/4 inches long. How many

Sloan [31]

Answer:

if you turn 1/8 and 7 3/4 to decimals they turn into 1/8=0.125 and 7 3/4=7.75 and 7.75/0.125=62

8 0

4 years ago

Find the value of Theta in these diagrams (a and b)

ZanzabumX [31]

a. θ = 36. 9°

b. θ = 114. 2°

<h3>How to determine the value of theta</h3>

a. We use the cosine identity

cos θ = adjacent/hypotenuse

Adjacent = 4cm

Hypotenuse = 5cm

cos θ = 4/ 5

cos θ = 0. 8

Now, we have the inverse of the cosine value

θ = cos^-1 (0. 8)

θ = 36. 9°

b. We use the tangent identity

tan a = opposite / adjacent

tan a = 3. 8/1. 7

tan a = 2. 23

a = tan^-1 ( 2. 23)

a = 65. 8

We have;

a + θ = 180 °; angles on a straight line

θ = 180 - 65. 9

θ = 114. 2°

Learn more about trigonometric identities here:

brainly.com/question/7331447

#SPJ1

5 0

1 year ago

Write an equation of the line passing through the points (4.15) and (-1. - 15).

jolli1 [7]

Answer:

y = 6x - 9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Slope-Intercept Form: y = mx + b

m - slope

b - y-intercept

Step-by-step explanation:

Step 1: Define

Point (4, 15)

Point (-1, -15)

Step 2: Find slope m

Substitute: $m=\frac{-15-15}{-1-4}$
Subtract: $m=\frac{-30}{-5}$
Divide: $m=6$

Step 3: Find y-intercept b

Define: y = 6x + b
Substitute: -15 = 6(-1) + b
Multiply: -15 = -6 + b
Isolate b: -9 = b
Rewrite: b = -9

Step 4: Write linear equation

Substitute in all variables.

y = 6x - 9

And we have our answer!

4 0

3 years ago

If a + b+ c = 9 and ab + bc + ca = 26, find a2 + b2 + c2.

alex41 [277]

Answer:

Step-by-step explanation:

6 0

3 years ago