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2 years ago

a stack of bricks is 3 1/2 feet high. if each brick is 1 3/4 inches high, how many bricks are in the stack?

1 answer:

6 0

The number of bricks= Total height of stack/ height of a single brick.
No. of bricks=3 1/2 ÷ 1 3/4
Convert the fractions into improper fractions;
No. of bricks= 7/2÷7/4
No. of bricks= $\frac{14}{4} * \frac{4}{7}$
No. of bricks= 2

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Two separate single-factor anovas provide exactly the same information that is obtained from a two-factor analysis of variance.

strojnjashka [21]

Not 100% sure but I think that it's true

7 0

3 years ago

Y=x +5<br> 5x + 2y=1<br><br> Can you show the steps thanks

lubasha [3.4K]

Answer:

(-9/7,-26/7)

[more detailed at the bottom of the explanation]

Step-by-step explanation:

I am assuming that this is a system of equations...

So, knowing that y is equal to x + 5, you would plug that in the second equation and find x. Then you would plug x and find y.

—————

Step 1)

Equation 1:

y = (x + 5)

Equation 2:

5x + 2y = 1

Equation 2 can also be written as:

5x + 2(x+5) = 1

I wrote x+5 instead of y because the first equation tells us that y is equal to x + 5.

—————

Step 2)

Solve for x .

5x + 2(x+5) = 1

5x + 2x + 10 = 1

7x + 10 = 1

7x = 1 - 10

7x = -9

x = -9/7

—————

Step 3)

Plug the x value back in the first equation.

y = -9/7 + 5

y = -26/7

—————

Solution:

x = -9/7

y = -26/7

In ordered pair form:

(-9/7,-26/7)

————— ————— —————

Hope this helps !!!!!!!

5 0

3 years ago

A train leaves the station at 9:00 pm traveling east at 36 miles per hour. A second train leaves the station at 10:00 pm traveli

GrogVix [38]

X - hours that passed after 10 pm

(x+1) 36 = x * 42 | / 6
(x+1)6 = 7x
6x+6 = 7x |-6x
x=6

They will travel same distance at 4 am.

4 0

3 years ago

Read 2 more answers

Consider the equation below.

Kamila [148]

Answer:

Option (1)

Step-by-step explanation:

$\text{log}_4(x + 3)=\text{log}_2(2 + x)$

$\text{log}_4(x + 3)=\frac{\text{log}_{10}(x+3)}{\text{log}_{10}4}$

$\text{log}_2(2 + x)=\frac{\text{log}_{10}(2+x)}{\text{log}_{10}2}$

System of equations can be written as,

$y_1=\text{log}_4(x + 3)=\frac{\text{log}_{10}(x+3)}{\text{log}_{10}4}$

$y_2=\text{log}_2(2 + x)=\frac{\text{log}_{10}(2+x)}{\text{log}_{10}2}$

Therefore, system of equations given in Option (1) is the correct option.

4 0

2 years ago

What is the equation of the line that passes through the point (-1, -7) and has a<br> slope of 2?

o-na [289]

Answer:

(a,b)------>(-1,-7)let

now

m(x-a)=(y-b)

2(x+1)=(y+7)(where m=slope

2x+2=y+7

2x-y=7-2

2x-y=5 is a required equation.

7 0

3 years ago