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skad [1K]
3 years ago
8

Solve the systemSolve the system by either substitution or elimination 4x + 4y = 20, 2x -2y = -18 by either substitution or elim

ination
Mathematics
1 answer:
valina [46]3 years ago
7 0
{4x + 4y = 20  | ÷4<span>
{2x -2y = -18   | </span>÷2

{x + y = 5 
{x -y = -9
--------------
2x = -4
x = -2

x + y = 5 
-2 + y = 5
y = 5 + 2
y = 7

The answer is (-2, 7)

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MatroZZZ [7]

Answer:

it's D

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
Which of the following is NOT a measure ofâ center? Choose the correct answer below.
irina [24]

Answer:

Option B) census

Step-by-step explanation:

We have to find the measure of center.

The measure of center is also known as the measure of central tendency.

The measure of central tendency for a data is given by

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  2. Median
  3. Mode

It help us to identify the central position of data in different ways.

Thus, out of the given option census is not a measure of center.

Option B) census

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3 years ago
Jean gets an allowance of $15 each month plus an extra $2 for each chore she completes around the house. How much allowance will
katovenus [111]
The answer is 2x + 15 dollars.
5 0
3 years ago
Richard’s checking account balance was $57.34 at the beginning of the week. During the week, he recorded the transactions below.
Tomtit [17]

Answer:

US$ 132.45

Step-by-step explanation:

See attachment for the missing table.

Given:

Richard’s checking account balance at the beginning of the week = $57.34

<u>Richard’s account balance at the end of the week from the given table:</u>

Deposits of the week = US$ 163.75

Expenses of the week = Groceries + Credit card bill + Gas

Expenses of the week = 25.37 + 50 + 13.27

Expenses of the week = US$ 88.64

Richard’s account balance at the end of the week = Richard’s checking account balance at the beginning of the week + Deposits of the week - Expenses of the week

Replacing with the real values:

Richard’s account balance at the end of the week = 57.34 + 163.75 - 88.64

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7 0
3 years ago
Read 2 more answers
What’s the correct answer for this?
earnstyle [38]

Answer:

6

Explanation:

According to secant-secant theorem,

(PB)(PA)=(PD)(PC)

(7)(12)=(PD)(14)

NOW

84/14 = PD

PD = 6

4 0
3 years ago
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