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2 years ago

15

How do i solve these and graph them ?!

1 answer:

Ainat [17]2 years ago

4 0

Use Desmos. It is good.

Here is the graph.
https://www.desmos.com/calculator/wq4kzps9fq

To change the color, you have to click on the line next to the formula for a long time. A window will pop up so you can change the color.

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Stan invests $5000, some at 6% interest and the rest at 4.5% interest. If x is the amount he invests at 6%, then the amount inve

Bumek [7]

Let's say that Stan invested $1500 at 6%. To find how much he invested at 4.5% would be 5000 - 1500 = $3500. Now we have a pattern. Now let's say stan invested x dollars. Even though it is unknown, we can set up how much is left. So subtract x from 5000 or 5000 - x which is C

8 0

3 years ago

Find the distance CD rounded to the nearest tenth

motikmotik

Answer:

CD ≈ 15.0

Step-by-step explanation:

calculate CD using the distance formula

d = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }$

with (x₁, y₁ ) = C (7, - 4) and (x₂, y₂ ) = D (- 8, - 5)

CD = $\sqrt{(-8-7)^2+(-5-(-4))^2}$

= $\sqrt{-15)^2+(-5+4)^2}$

= $\sqrt{225+(-1)^2}$

= $\sqrt{225+1}$

= $\sqrt{226}$

≈ 15.0 ( to the nearest tenth )

3 0

1 year ago

Plz help with <br> this problem!!!

jarptica [38.1K]

Answer:

opposite side are congruent

opposite sides are parallel

opposite sides are congruent

diagonals are perpendicular

Step-by-step explanation:

6 0

2 years ago

Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second mechanic worked for 5 hours. Together they

dimaraw [331]

The per hour rate of first mechanic is $95 and per hour rate of $75.

Step-by-step explanation:

Let,

First mechanic's rate = x

Second mechanic's rate = y

10 hours charges of first mechanic = 10x

5 hour charges of second mechanic = 5y

According to given statement;

10x+5y=1325 Eqn 1

x+y=170 Eqn 2

Multiplying Eqn 2 by 10

$10(x+y=170)\\10x+10y=1700\ \ \ Eqn\ 3$

Subtracting Eqn 2 from Eqn 3

$(10x+10y)-(10x+5y)=1700-1325\\10x+10y-10x-5y=375\\5y=375$

Dividing both sides by 5

$\frac{5y}{5}=\frac{375}{5}\\y=75$

Putting y=75 in Eqn 2

$x+75=170 \\x=170-75\\x=95$

The per hour rate of first mechanic is $95 and per hour rate of $75.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

8 0

2 years ago

The area of a circle is 153.86 square meters. What is the diameter of a circle?

levacccp [35]

Answer:

7.8 (when I calculated I rounded to tenths so the actual answer might be a little bit different)

Step-by-step explanation:

the area of a circle is radius squared so

153.86= radius squared

sqaure root both sides and you get 12.4 =radius

divide both sides by pi and you get 3.9 which is the radius

the diameter is double the radius which is 3.9 *2 which is 7.8 :) hope this helped.

7 0

2 years ago