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3 years ago

Calculate the area of a triangle with a base 14cm long and a height of 20cm

Mathematics

2 answers:

Wewaii [24]3 years ago

8 0

Ok so our formula is hbb divide by 2 so our answer would be 140cm square

babunello [35]3 years ago

3 0

So the area of a triangle formula is a=hb times b /2 so 14 times 20 is 180 divide by 2 is 140

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If 10% is deducted from a bill, $58.50 remains to be paid. How much is the original bill?

NARA [144]

Answer:

From the above we can roughly for an equation which is:

58.50 = Bill - (10% x Bill)

58.5 = Bill - (1/10 x Bill)

58.5 = 9/10 x Bill (Divide both sides by 9/10)

We get:

Bill = 58.5 / (9/10)

Bill = 65

Original bill is $65.

8 0

2 years ago

#12<br> The distance between the points (3, 3) and (7, 3) is

Marina CMI [18]

Solution:

We have been asked to find the distance between the points (3, 3) and (7, 3).

we can find the distance between the two points using the distance formula.

The distance formula is given as

$D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} \\ \\ \text{where } (x_1, y_1) \ and \ (x_2, y_2) \ are \ two \ points\\$

Now substitute the given values we get

$D=\sqrt{(7-3)^2+(3-3)^2}\\ \\ \ D=\sqrt{4^2+0}=4\\$

Hence the distance between the given points is 4

5 0

3 years ago

Use number sense to solve the equation. 3x + 14 = 23 A. 3 B. 6 C. 9 D. 4

Artist 52 [7]

Answer:

x=3

Step-by-step explanation:

3x + 14 = 23

3x=23-14

3x=9

x=9/3

x=3

option A is the correct answer

5 0

3 years ago

Use trigonometry to work out the height, v,

IrinaVladis [17]

Answer: 8.2 mm

Step-by-step explanation:

$\sin 60^{\circ}=\frac{v}{9.5}\\\\v=9.5 \sin 60^{\circ} \approx \boxed{8.2 \text{ mm}}$

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2 years ago

Nine more than 3 times a number is the same as 6 less than twice the number

Ludmilka [50]

Answer:

Step-by-step explanation:

Let the number = x

3x + 9 = 2x - 6 Looks like you are going to get something negative here.

Subtract 2x from both sides.

3x - 2x + 9 = 2x - 2x - 6

x + 9 = -6

Subtract 9 from both sides.

x + 9 - 9 = - 6 - 9

Combine

x = - 15

7 0

3 years ago