4 years ago

Write an expression that is equivalent to 5×(6×7) . Use the same terms in your expression.

Mathematics

1 answer:

astraxan [27]4 years ago

6 0

5 x (7x6)
Multiplication is commutative so u can swap the numbers around

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Given: Q = 7m + 3n, R = 11 - 2m, S = n + 5, and T = -m - 3n + 8.

Elan Coil [88]

Answer:

<h2> The second: 8m + 7n - 3 </h2>

Step-by-step explanation:

Q = 7m + 3n,

R = 11 - 2m,

S = n + 5,

T = -m - 3n + 8.

Q + S - T = 7m + 3n + (n + 5) - (-m - 3n + 8)

Q + S - T = <u>7m</u> + 3n + n + 5 <u>+ m</u> + 3n - 8

Q + S - T = 8m + 7n - 3

4 0

3 years ago

Help I do not understand this

marshall27 [118]

Answer:

sin(30)° = $\frac{10}{x}$

Step-by-step explanation:

By applying sine rule in the given triangle,

sin(30)° = $\frac{\text{Opposite side}}{\text{Hypotenuse}}$

sin(30)° = $\frac{10}{x}$

$\frac{1}{2}= \frac{10}{x}$

x = 2 × 10

x = 20

Therefore, answer will be sin(30)° = $\frac{10}{x}$ .

3 0

3 years ago

How do you solve this <br> 3(2.6x-3=4(-7-2.8)

Maslowich

Answer:

$x=-3.87$

Step-by-step explanation:

We want to solve for $x$ in $3(2.6x-3)=4(-7-2.8)$

We expand to get: $7.8x-9=-28-11.2$

We group similar terms to get:

$7.8x=9-28-11.2$

This simplifies to $7.8x=-30.2$

Divide both sides by 7.8 to get

$x=\frac{-30.2}{7.8}= -3.8718$

4 0

4 years ago

(find percent error) a political analyst predicts Mr. Smith will only get 122 votes for mayor. if Mr. Smith only gets 57 votes,

Dmitry [639]

The difference between the prediction & the reality is 122-57 =65 votes.

Then over 122, the error was 65 votes &

the error ratio is 65/122 = 0.5327 ==>53.27% Or 53.3% (rounded)

7 0

4 years ago

Read 2 more answers

Answer quickly please!<br> Find the perimeter of the figure to the nearest hundredth.

Ronch [10]

10+8+6=24

π x 12/2
6 π
24+6 π= 42.84955592

Answer= 42.849cm

5 0

3 years ago