Answer:
7
Step-by-step explanation:
7.base of triangle=√(32.5²-28²)
=√4.5(32.5+28)
=√4.5(60.5)
=√272.25
=16.5
area of triangle=1/2 ×16.5×28
=231
volume=231×31=7161 km³
8.
39.4-25=14.4
width=√(30.6²-14.4²)
=√16.2(30.6+14.4)
=√16.2(45)
=√729
=27
volume=(25+39.4)/2 ×27×35
=(64.4)/2×27×35
=32.2×27×35
=30429 cm³
Answer:
x + Y = 39 or x = 39-y
20x + 50y = 1.40
20 (39 - y) + 50y = 11.40
7.80 - 20y + 50y = 11.40
30y = 11.40 - 7.80
30y = 3.60
y = 3.60/30
y = 12 50p coins were collected.
x = 39 - 12 = 27 20p coins were collected.
Proof:
20*27 + 50*12 = 11.40
5.40 + 6 = 11.40
11.40 = 11.40
I hope it helps.
The coordinates are (2, -5)
what you need to do to find this is see where it falls on the x line. in this case it’s 2. if it were to be on the left of the y line it’d be a negative number. to find y see were it falls on the y line. in this case it’s -5. if it were to fall above the x line it’d be a positive.
i’m not too good at explaining things srry
Answer:
A
Step-by-step explanation:
Area of a triangle:
![A=\frac{b*h}{2}](https://tex.z-dn.net/?f=A%3D%5Cfrac%7Bb%2Ah%7D%7B2%7D)
In our case:
b=4
h=2
Plug in what we know:
![A=\frac{(4)(2)}{2} \\A=4units](https://tex.z-dn.net/?f=A%3D%5Cfrac%7B%284%29%282%29%7D%7B2%7D%20%5C%5CA%3D4units)
Find the matching solution:
A.) it is 1/2 the area of a rectangle of length 4 units and width 2 units
X B.) it is twice the area of a rectangle of length 4 units and width two units
X C.) it is 1/2 the area of a square of side length 4 units
X D.) it is twice the area of a square of side length 4 units
<h3>
Answer:</h3><h3>
<em><u>T</u></em><em><u>R</u></em><em><u>U</u></em><em><u>E</u></em></h3>
a function is a rule that assigns each value of the variable to exactly one value of the dependent variable