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3 years ago

Simplify the expression. -2x + -5 + 8x + -4 Question 3 options:

Mathematics

1 answer:

Leokris [45]3 years ago

5 0

6x + (-9) or 6x - 9

Try looking at the terms for the same things. Such as the variable like X and the negatives add together and make a negative

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3x = 2x + 7<br> 4 5<br> x = ?

Alexxandr [17]

<h2>Solve for <em>x</em> | Solution and Explanation</h2>

_______________________________________________

We are given the following expression:

$\frac{3x}{4} =\frac{2x+7}{5}$

1. Apply fraction cross multiply (if $\frac{a}{b}=\frac{c}{d}$ , then $a$ × $d$ = $b$ × $c$ )

$3x$ × $5 = 4(2x+7)$

==================

2. Simplify.

$15x=4(2x+7)$

==================

3. Expand 4(2x + 7).

$15x=8x+28$

===========================

4. Subtract 8x from both sides.

$15x-8x=8x+28-8x$

=======================

5. Simplify.

$7x=28$

=======================

6. Divide both sides by 7.

$\frac{7x}{7}=\frac{28}{7}$

========================

7. Simplify.

$x=4$

=========================

Hope this helps!

6 0

1 year ago

Rebecca will use mixed styles of fabric she has to make a quilt. She has 2 yards of animal print fabric. She has farm house fabr

Bezzdna [24]

Answer:

10 1/4

Step-by-step explanation:

it is talking about how many total yards she has to make her quilt then add them up and you get 10 1/4 you welcome I had the same question

6 0

3 years ago

Which expression is equivalent to 3^4 ⋅ 3−^9?

AleksAgata [21]

Answer:

3^-5 = 1/3^5

Step-by-step explanation:

3^4 ⋅ 3−^9

When multiplying exponents and the bases are the same, we can add the exponents

a^b * a^c = a^ ( b+c)

3^4 ⋅ 3−^9

3^( 4-9)

3^-5

We know that a^ -b = 1/a^b

3^-5 = 1/3^5

3 0

3 years ago

Read 2 more answers

a school system is reducing the amount of dumpster loads of trash removed each week in week 5 there were 45 dumpster loads of tr

Llana [10]

Answer:

y = -3x + 60, D: x ≥ 0, r: y ≥ 0

Step-by-step explanation:

1. Find the slope (x-axis is the week number, y-axis is the # of dump loads)

Slope equation: (y₁ - y₂)/(x₁ - x₂), where two points are (x₁, y₁) and (x₂, y₂)

Plug in: (45 - 30)/(5 - 10)

Subtract: 15/(-5)

Divide: <em>-3</em>, representing the number of dumps removed/week

2. Find the y-intercept (when x = 0)

Since we found that 3 dumps are removed per week, we can find that at week 0, there were <em>60</em> dump loads.

3. Construct equation

Point-intercept equation: y = mx + b, where m = slope, b = y-intercept

Plug in: y = -3x + 60 (with the domain of x ≥ 0 and the range of y ≥ 0)

7 0

3 years ago

The ratio of 6th-grade students to 8th-grade students in a school is 4 to 5. How many 6th grade students are there if a school h

myrzilka [38]

Answer: 288

Step-by-step explanation: 360/5 is 72 so multiply the 6th graders times 72 and you get 288

6 0

3 years ago