Ask question

Ask question

All categories

alukav5142 [94]

3 years ago

11

Mari has 28 wooden cubes. she wants to stack them to form a triangle. Each row will have one block fewer than the row below it.

How many blocks will be in the bottom row of the pyramid?. 6 six cubes, 7 cubes, 8 cubes or 9 cubes?

1 answer:

gtnhenbr [62]3 years ago

8 0

I do believe the answer is 7

You might be interested in

Use substitution to solve the following system of linear equations and fill in the following blanks:

marissa [1.9K]

Answer:

$x=-4$

$y=3$

$z=-5$

Step-by-step explanation:

<u>Given:</u>

$x+y+z=-6$

$x-6y-7z=-29$

$-7y-5z=4$

<u>Solve for </u> $x$ <u> in the 1st equation:</u>

$x+y+z=-6$

$x+y=-z-6$

$x=-y-z-6$

<u>Substitute the value of </u> $x$ <u> into the 2nd equation and solve for </u> $z$ <u>:</u>

$x-6y-7z=-29$

$(-y-z-6)-6y-7=-29$

$-7y-z-13=-29$

$-7y-z=-16$

$-z=-16+7y$

$z=16-7y$

<u>Substitute the value of </u> $z$ <u> into the 3rd equation and solve for </u> $y$ <u>:</u>

$-7y-5z=4$

$-7y-5(16-7y)=4$

$-7y-80+35y=4$

$28y-80=4$

$28y=84$

$y=3$

<u>Plug </u> $y=3$ <u> into the solved expression for </u> $z$ <u> and evaluate to solve for </u> $z$ <u>:</u>

$z=16-7(3)$

$z=16-21$

$z=-5$

<u>Plug </u> $z=-5$ <u> into the solved expression for </u> $x$ <u> and evaluate to solve for </u> $x$ <u>:</u>

$x=-(3)-(-5)-6$

$x=-3+5-6$

$x=2-6$

$x=-4$

Therefore:

$x=-4$

$y=3$

$z=-5$

6 0

2 years ago

Find all roots x(x-1)(x-2) like find solution

Inessa05 [86]

$x(x-1)(x-2)=0\\
x=0 \vee x=1 \vee x=2$

3 0

2 years ago

A reading specialist wanted to estimate the mean word length, in number of letters, for an elementary school history textbook. T

Alika [10]

Answer:

Step-by-step explanation:

culo

7 0

2 years ago

Read 2 more answers

4500 people attended a football game. If 4% of the people who attended were teenagers, how many teenagers attended the game?

marysya [2.9K]

Answer:

180 teenagers were at the game

7 0

2 years ago

A. Describe two ways to find product 4.2 (6+ 0.43)

weqwewe [10]

First method:

What we can do first is to distribute directly 4.2 to 6 and 0.43, that is:

4.2 (6 + 0.43)

= 4.2 * 6 + 4.2 * 0.43

= 25.2 + 1.806

= 27.006

Second method:

We can add the two numbers 6 and 0.43 then multiply with 4.2, that is:

4.2 (6 + 0.43)

= 4.2 (6.43)

= 27.006

What we see is the Distributive Property of multiplication which states that multiplying the sum of a number is similar to multiplying each number and then adding the products.

5 0

2 years ago