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spin [16.1K]
3 years ago
7

Please help I will give brainly

Mathematics
2 answers:
Natalija [7]3 years ago
6 0

Answer: 7

Step-by-step explanation:

In the end if his cards are doubled to 20 then 20 / 2 = 10 and if his friend gave him 3 more cards then you would subtract 3 from 10 then that would = 7

Aleks04 [339]3 years ago
5 0

ok so the easy way is this

Marc says he will have 20 if he doubles his cards.

if u divide 20 by 2 = 10

but His friend gave him 3 cards before.which means that

10-3 = 7

He started with 7 cards

I answered b and c.

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Question 3, help please!
White raven [17]

The answer is not defined.

Explanation:

The given matrix is $\left[\begin{array}{cc}{2} & {4} \\ {1} & {-6}\end{array}\right]+\left[\begin{array}{c}{1} \\ {0}\end{array}\right]$

The matrix $\left[\begin{array}{cc}{2} & {4} \\ {1} & {-6}\end{array}\right]$ has dimensions 2\times 2

This means that the matrix has 2 rows and 2 columns.

Also, the matrix $\left[\begin{array}{l}{1} \\ {0}\end{array}\right]$ has dimensions 2\times1

This means that the matrix has 2 rows and 1 column.

Since, the matrices can be added only if they have the same dimensions.

In other words, to add the matrices, the two matrices must have the same number of rows and same number of columns.

Since, the dimensions of the two matrices are not equal, the addition of these two matrices is not possible.

Hence, the addition of these two matrices is not defined.

4 0
3 years ago
What is the volume of the solid figure?<br> Enter your answer in the box.<br><br> Please help..
Gre4nikov [31]

Answer:

188

Step-by-step explanation:

10*5*4 - 6*2

5 0
3 years ago
A hyena runs at a rate 32 miles per hour. Which equation models the situation? H = time spent running, in hours d = distance run
Nadusha1986 [10]

Answer:

32h = d

Step-by-step explanation:

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4 0
2 years ago
Given the following students' test scores (95, 92, 90, 90, 83, 83, 83, 74, 60, and 50), identify the mean, median, mode, range,
il63 [147K]
Mean- 71.7
median- 83
mode- 90, 83
range- 45
variance- 50

i do not remember standard deviation.
3 0
3 years ago
A recipe calls for 2 tsp of butter. Melinda wants to make 40% more servings than the recipe makes.
olga_2 [115]
Given:
recipe: 2 tsp of butter
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additional of 40% makes it 100% + 40% = 140%

140% * 2 tsp = 2.8 tsp.

The expression that shows the number of teaspoons needed is:
D. 1.4 x 2
3 0
3 years ago
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