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spayn [35]
3 years ago
7

The work of a student to solve a set of equations is shown:

Mathematics
1 answer:
borishaifa [10]3 years ago
7 0
The student first made an error in step 2 when she simplified... She should have used the distributive property to distribute the -4 through the parentheses. It should look like this...

-4 (y) = -4 (4 - 2z)
-4y = -16 + 8z
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Liz earns a salary of $2,000 per month, plus a commission of 8% of her sales. She wants to earn at least $2,500 this month. Ente
andrezito [222]

Answer: $2000 + 0.08s ≥ $2500

Step-by-step explanation:

The expression that will be used to calculate the earnings of Liz will be:

= b + (c × s)

Where:

b = base salary = $2,000

c = commission rate = 8% = 8/100 = 0.08

s = the sales that the commission rate will be applied against.

The inequality to find amounts of sales that will meet Liz goal will be:

= b + (c × s)

= $2000 + (0.08 × s) ≥ $2500

= $2000 + 0.08s ≥ $2500

6 0
4 years ago
A tennis ball has a diameter of 2.7 inches. What is the approximate volume of the tennis ball
jonny [76]

Answer:

volume = 10.2 in³

Step-by-step explanation:

r = 2.7/2 = 1.35

volume = 4/3πr³ = 4/3(3.14)(1.35³) = 10.2 in³

4 0
3 years ago
Solve for<br> a. 7a-2b = 5a+b
nordsb [41]
7a-2b = 5a + b
2a=3b
a = 3b/2
7 0
3 years ago
Read 2 more answers
HELP PLEASE I NEED IT ASAP IT WILL MEAN A LOT TO ME!! PLEASE
adoni [48]

Answer:

1: x=3\sqrt{8+y^{2} } and the same, but its -3 instead of 3

2: x=9-3y

5 0
3 years ago
Read 2 more answers
U(8, 9) and V(2, 5) are the endpoints of a line segment. What is the midpoint M of that line segment?
Crazy boy [7]

Answer:

(5, 7 )

Step-by-step explanation:

Given 2 points (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is

[ 0.5(x₁ + x₂ ), 0.5(y₁ + y₂ ) ]

here (x₁, y₁ ) = U(8, 9) and (x₂, y₂ ) = V(2, 5), thus

midpoint = [0.5(8 + 2), 0.5(9 + 5) ] = [0.5(10), 0.5(14) ] = (5, 7 )

6 0
4 years ago
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