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Luda [366]
3 years ago
14

4 bags of cement do 18 m² how many m^2 can be done with seven bags

Mathematics
1 answer:
lisov135 [29]3 years ago
7 0

Answer:

31.5 m^2

Step-by-step explanation:

To find the amount for 7 bags, create a proportion.

\frac{4}{18} =\frac{7}{y}

To solve for y, cross multiply numerator to denominator of each fraction.

4(y) = 18(7)

4y= 126

y= 31.5

7 bags will do 31.5 m^2

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Please help! Correct answer only!
Scorpion4ik [409]

$15 I believe, apologies if incorrect!

3 0
3 years ago
Read 2 more answers
What is the height of a rectangular prism that has a volume of 192 cubic feet and a base with an area of 48 square feet? Explain
Harman [31]
The formula for volume is length × width × height, so this is the same as area of cross section × height. So, if the base of the rectangular prism (the cross section) has an area of 48 square feet, then 48 × the height = 192 cubic feet. Working backwards, we can find out the height (h will stand for height):
48×h=192
h=192÷48
h=4
Therefore, the height of the rectangular prism is 4 feet
6 0
4 years ago
Fawzia has an action figure collection of 500 action figures. She keeps 58% of the action figures on her wall. How many action f
Afina-wow [57]

Answer:

<u>290</u>

Step-by-step explanation:

Formula :

<u>Number of action figures on wall = Total number of figures × % of figures on wall</u>

<u />

=============================================================

Given :

⇒ Total number of action figures = 500

⇒ % of action figures on wall = 58%

=============================================================

Solving :

⇒ Action figures on wall = 500 × 58%

⇒ Action figures on wall = 500 × 58/100 (all % are ratios of 100%)

⇒ Action figures on wall = 5 × 58

⇒ Action figures on wall = <u>290</u>

7 0
2 years ago
Read 2 more answers
-1/7÷-5/9<br><br>7/8÷8/9<br><br><br>Show the steps please​
Anvisha [2.4K]
So here, the rule "keep,change,switch" works great. so you keep the first fraction the same, switch the division to multiplication and then turn the second fraction upside down
so it looks like this:

-1 * -9= 9
7* 5= 35 = (9/35)

then

7* 9= 63 = (63/64)
8* 8= 64

7 0
3 years ago
Which value, when placed in the box, would result in a system of equations with infinitly many solutions? Y=2x - 5 2y-4x=
Nezavi [6.7K]

Given:

The system of equations is

y=2x-5

2y-4x=?

To find:

The missing value for which the given system of equations have infinitely many solutions.

Solution:

Let the missing value be k.

We have,

y=2x-5

2y-4x=k

Taking all the terms on the left side, the given equations can be rewritten as

-2x+y+5=0

-4x+2y-k=0

The system of equations a_1x+b_1y+c_1=0 and a_2x+b_2y+c_2=0 have infinitely many solutions if

\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}

We have,

a_1=-2,b_1=1,c_1=5

a_2=-4,b_2=2,c_2=-k

Now,

\dfrac{-2}{-4}=\dfrac{1}{2}=\dfrac{5}{-k}

\dfrac{1}{2}=\dfrac{1}{2}=\dfrac{5}{-k}

\dfrac{1}{2}=\dfrac{5}{-k}

On cross multiplication, we get

-k=10

k=-10

Therefore, the missing value is -10.

6 0
3 years ago
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