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3 years ago

6. A student driver travels at a speed of 3km/h for an hour and a half. What

Mathematics

1 answer:

castortr0y [4]3 years ago

5 0

Answer:

4.5 km

Step-by-step explanation:

3km times 1 = 3 and then 3km times .5 = 1.5

3+1.5= 4.5

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7 divided by the quantity a minus 6

Nesterboy [21]

Answer:

7 ÷ (a - 6)

Step-by-step explanation:

5 0

3 years ago

What is 1/3 of 1/9 of a ton? Make sure your answer is fully reduced

natulia [17]

Answer:

0.03703703703

Step-by-step explanation:

6 0

3 years ago

Pls answer this i need help

Vitek1552 [10]

Step-by-step explanation:

your don't see what went wrong ?

Tyrell worked on

16 - 2(4 + 3x)

what do brackets mean ? they mean that this operation has to be done before everything else in the expression.

as this contains a variable, we cannot fully calculate it, true, but we need to keep this in mind and always treat the content of the brackets as one package.

so, whatever I do from the outside with one part of that package, I have to do also with all the other parts of that package.

so, the multiplication with -2 has to happen with both : 4 and 3x. not just with 4.

therefore, the correct simplification looks like

16 - 8 - 6x

8 - 6x or -6x + 8

Amelia multiplied correctly, but then made a mistake summing things up

10x - 3(4x + 1)

10x - 12x - 3

10x - 12x = -2x

I can't mix the pure constant -3 into the factors of x. that would be like the famous mixing of apples and oranges.

so, the result is

-2x - 3

6 0

2 years ago

Find the sumofthe geometrical progression of five terms, of which the first term is 7 and the multiplier is 7.Verify that the su

777dan777 [17]

Answer:

The sum of first five term of GP is 19607.

Step-by-step explanation:

We are given the following in the question:

A geometric progression with 7 as the first term and 7 as the common ration.

$a, ar, ar^2,...\\a = 7\\r = 7$

$7, 7^2, 7^3, 7^4...$

Sum of n terms in a geometric progression:

$S_n = \displaystyle\frac{a(r^n - 1)}{(r-1)}$

For sum of five terms, we put n= 5, a = 7, r = 7

$S_5 = \displaystyle\frac{7(7^5 - 1)}{(7-1)}\\\\S_5 = 19607$

The sum of first five term of GP is 19607.

Verification:

$2801\times 7 = 19607$

Thus, the sum is equal to product of 2801 and 7.

7 0

3 years ago

A statue that is 80 m tall stands on a 625 m2 base. An artist creates a replica using a ratio of 1:15. What is the area of the r

Sholpan [36]

Answer: $2.78m^{2}$

Step-by-step explanation:

given data:

height of the statue = 80m.

base of the statue = $625m^{2}$ .

scale of the statue replica = 1:15.

solution:

$= 1:15^{2} \\\\\= 1:225\\\\$

$= \frac{625m^{2} }{225}$

= $2.78m^{2}$

the area of the replica is $2.78m^{2}$

4 0

2 years ago