Solve photo question, please. :)

Answers

Answer 1

Answer: You wouldnt get any solutions as if you substituted them into each other you would get:
-3x - 6 = -3x + 7
the -3x cancel eachother out so you end up with
-6 = 7 which isnt true

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A company's profits for a week are as follows:Monday: +$32.65, Tuesday: -$75.32,
Wednesday: -$125.75, Thursday: +$100.89,
and Friday: +$65.30. Does the company show
a gain or loss at the end of the week?

Answers

Answer:

Loss

Step-by-step explanation:

If you add all the numbers up you get -2.23 which would be a loss

Answer:

The company shows loss

Step-by-step explanation:

32.65 - 75.32= -42.67 so they're already at a loss

you would add -125.75 and -42.67 and woud get -168.42

Then you would add 100.89 and 65.30 and you would get 166.19

166.19+(-168.42)=-2.23

Use the substitution method to solve 3x-5y=-8 and x+2y=1

Answers

$\boxed{ \left \{ {{3x-5y=-8} \atop {x+2y=1}} \right.} \n \n x+2y=1\Rightarrow \boxed{x=1-2y} \n------------- \n \boxed{\left \{ {{3x-5y=-8} \atop {x=1-2y}} \right. } \n\n3(1-2y)-5y=-8 \n 3-6y-5y=-8\n\n3-11y=-8\n\n-11y=-8-3 \n \n -11y=-11y \n \n \boxed{y=1} \Rightarrow \boxed{x=-1}$

The amount of money left on a loan that Kira owes her grandmothers is represented by the function k(t)=280(.88)^t where k(t) represents the amount of money left on a the loan and t represents the time, in years. Find r, the percent change and explain what it represents.

Answers

Given:
k(t) = 280(0.88)^t

t = 1 ; t = 2 ; t = 3
k(1) = 280(0.88)¹ = 280(0.88) = 246.40
k(2) = 280(0.88)² = 280(0.7744) = 216.83
k(3) = 280(0.88)³ = 280(0.681472) = 190.81

280 - 246.40 = 33.60 ⇒ 33.60/280 = 0.12
246.40 - 216.83 = 29.57 ⇒ 29.57/246.40 = 0.12
216.83 - 190.81 = 26.20 ⇒ 26.20/216.83 = 0.12

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What is the radius of a circle with circumference 22m? Instructions: Solve Each Problem. Round to the nearest tenth, If necessary. Use 3.14

Answers

The radius of a circle: r = ?
C = 22 m
C = 2 r π
r = C /( 2 π )
r = 22 / ( 2 · 3.14 )
r = 22 / 6.28
Answer:
r = 3.5 m

What is the exact volume of a sphere with a diameter of 30 in.?

____ pi in^3

Answers

Volume of a sphere = 4/3 pi r^3 = 4/3 pi * (30/2)^3 = 4/3 pi * 15^3 = 4/3 pi * 3375 = 4500 pi in^3

What is 9 times 3/4?

Answers

When multiplying a whole number by a fraction, put the whole number as a fraction over one. 9/1 times 3/4. When multiplying fractions, you multiply straight across. 9(3)=27 and 1(4)=4. The new fraction is 27/4.

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