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Bingel [31]
3 years ago
6

How can addition patterns help me add mentally?

Mathematics
1 answer:
mylen [45]3 years ago
8 0

Answer:

C) subtract one x block from the left side and subtract two numbered blocks from the right side

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A test is worth 100 points. The test is made up of 40 items. Each item is worth either 2 points or 3 points. Which matrix equati
lidiya [134]

Answer:

Total number of points in the test = 100

Total number of items in the test = 40

Let number of items of 2 points be x and number of items of 3 points be y.

Now, using the given information the situation can be represented by using the following equations :

⇒ x + y = 40 .........(1)

⇒ 2x + 3y = 100 .........(2)

The matrix equation is :

\begin{bmatrix}1 & 1\\ 2& 3\end{bmatrix}\cdot \begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}40\\ 100\end{bmatrix}

By solving the equation (1) and equation (2), we get :

Solution : x = 20 and y = 20

4 0
3 years ago
Read 2 more answers
The point (–3, –4) is reflected across the x-axis. What quadrant is the reflected point located? A. Quadrant I B. Quadrant II C.
Natali5045456 [20]

Answer:

B

Step-by-step explanation:

Since (-3, -4) is in Quadrant III and the reflected point will be "flipped" vertically the answer is Quadrant II.

5 0
3 years ago
Can someone plz help me with this one problem plzzzzz!!! I will mark brainliest
Tpy6a [65]

Answer:

2 = 76

3 = 114

8 = 304

10 = 380

5 0
2 years ago
Ravi made 4 identical necklaces each having beads and a pendant. The total cost of the beads and pendants are for all four neckl
vekshin1

Answer:

Each pendant cost $3.30

Step-by-step explanation:

You would subtract $13.20 from $26.20  and get $13.20. You take $13.20 and divide it by 4. You would get $3.30.

3 0
3 years ago
The price of a shirt is marked down from $12.50 to $10,00. What is the percent decrease of the shirt?
choli [55]

Answer: 20%.

Step-by-step explanation:

Given, The price of a shirt is marked down from $12.50 to $10.00.

Previous price = $12.50

New price = $10.00

Change in price = Previous price - New price

= $12.50 - $10.00

= $2.50

Now, the percent decrease of the shirt = \dfrac{\text{Change in price}}{\text{Prevoius price}}\times100

=\dfrac{2.50}{12.50}\times100\\\\=20\%

Hence, the percent decrease of the shirt = 20%.

7 0
3 years ago
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