All categories

4 years ago

Can someone help with this I don’t understand

Mathematics

1 answer:

Karo-lina-s [1.5K]4 years ago

3 0

Answer: see below

Step-by-step explanation:

3x-12=7x+8 ⇔ given

-12=4x+8 ⇔ addition property of equality

-20=4x ⇔ subtraction property of equality

x=-5 ⇔ division property of equality

-----------------------

5(x-1)=4x+13 ⇔ given

5x-5=4x+13 ⇔ distributive property

x-5=13 ⇔ subtraction property of equality

x=18 ⇔ addition property of equality

You might be interested in

<1 and <2 are supplementary. m<1=4x and m<2 =92 what is the value of x

monitta

Answer:

x=22

Step-by-step explanation:

Supplementary means that the two angles that are supplementary equal 180 degrees. 180-m<2=m<1

180-92=88 (m<2=92)

m<1=88

m<1=4x

4x=88

x=22

7 0

3 years ago

I can't write the problem but I’ll insert in the picture

Hoochie [10]

It’s 60 degrees
Ex: the total number when the degrees is added together should be 180

8 0

2 years ago

From the top of a building, 40 feet above the ground, a construction worker locates a rock at a 12° angle of depression. How far

MA_775_DIABLO [31]

Answer:

188 m

Step-by-step explanation:

$\tan(12) = \frac{40}{x} \\ x = \frac{40}{ \tan(12) } \\ x = 188$

6 0

3 years ago

Read 2 more answers

What has a foot on each end and in the middle

cricket20 [7]

Is it a yardstick? It has 2 ft of the edges and one ft in the middle.

8 0

3 years ago

Melissa Costouras obtains a $3,000 loan for darkroom equipment. She makes six monthly payments of $511.18. Determine the APR.

nasty-shy [4]

Using the simple interest formula, it is found that the APR for the loan is of 4.472%.

<h3>What is the simple interest formula and when it is used?</h3>

Simple interest is used when there is a single compounding per time period.

The amount of money after t years in is modeled by:

$A(t) = A(0)(1 + rt)$

In which:

A(0) is the initial amount.

r is the interest rate, as a decimal.

The parameters for this problem are:

A(t) = 6 x 511.18 = 3067.08, A(0) = 3000, t = 0.5.

We solve the equation for r to find the APR.

$A(t) = A(0)(1 + rt)$

$3067.08 = 3000(1 + 0.5r)$

$1 + 0.5r = \frac{3067.08}{3000}$

1 + 0.5r = 1.02236

r = (1.02236 - 1)/0.5

r = 0.04472.

More can be learned about simple interest at brainly.com/question/25296782

#SPJ1

5 0

1 year ago