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2 years ago

(√49 – 4)² - 5 as numeral

Mathematics

2 answers:

kotykmax [81]2 years ago

8 0

Answer:

Step-by-step explanation:

(√49 –4)²–5

=(√49–4)(√49–4)–5

=49–4√49–4√49+16–5

=60–8√49

but √49 =7

=60–8(7)

=60–56

CaHeK987 [17]2 years ago

4 0

Answer:

(7-4)^2 - 5

3^2 - 5

9-5

4 or IV

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16. Mum went shopping at the vegetable stand.

kondaur [170]

Good evening

Answer:

a) the cost of one apple is €0.9

b) the cost of one pineapple is €5.4

c) the cost of two pineapples and six apples is €16.2

Step-by-step explanation:

Consider P the price of a pineapple

A the price of an apple

A pineapple costs six times as much as an apple means P = 6A

Mum paid €7.20 for one pineapple and two apples means P + 2A = 7.20

then

6A + 2A = 7.20

then

8A = 7.20

then

A = €0.9

Since P = 6A then P = 6×(0.9) = €5.4

the cost of two pineapples and six apples

= 2P + 6A

= 2P + P

= 3P

= 3×(5.4)

= €16.2

7 0

4 years ago

Pleaseee answer I realllyyy neeedddd helpppll

Gnom [1K]

Answer:

x is the independent variable

y is the dependant variable

-3 is the rate of change (otherwise known as gradient or slope)

-7 is the initial value

Step-by-step explanation:

The dependant variable is the variable which is determined by the value of the independent variable;

So, if we say x = 1, then the value of y is as follows, y = -3(1)-7 = -10;

The independent variable is (practically) always the x-values and the dependant variable is (practically) always the y-values.

Conventionally, the independent variable, on a graph, is on the x-axis and the dependant variable is on the y-axis.

The rate of change/gradient, in the case of line equations, is simply the coefficient of x, which is just the number that appears before "x" in the equation, i.e. -3.

The initial value is found simply by setting x = 0, and calculating the value of y;

This will always be the number in the equation that is not the coefficient of x, i.e. the number added or subtracted in the equation, -7 in this case.

5 0

3 years ago

Raghav has to load 2456 cartons of apples equally in 5 trucks. how many cartons will be left unloaded in the end?

zlopas [31]

Answer:

12,280

Step-by-step explanation:

just do 1456×5 :))

7 0

3 years ago

Send help ??? please

ch4aika [34]

Answer: One solution

Step-by-step explanation:

The two lines only intersect at one point, (-9,-23)

8 0

3 years ago

Read 2 more answers

A 12 foot ladder is leaning against a building. If the bottom of the ladder is sliding along the pavement directly away from the

ira [324]

Using Pythagoras theorem, the top of the ladder moving down when the foot of the ladder is 3 feet from the wall is of -0.518 feet/sec.

Let distance from the wall to the foot of the ladder is 'x' feet and the height of the top of the ladder is 'y' feet.

Pythagoras theorem, $x^{2} + y^{2} = (12)^{2}$ --->(1)

Given, $\frac{dx}{dt}= 2feet/second$ at x=3

Put x=3 in Pythagoras theorem equation (1)

$(3)^{2} + y^{2} = 144$

$y^{2} = 144 - 9$

$y^{2}$ = 135

y = 11.61

Derive equation (1) w.r.t to 't'

$2x\frac{dx}{dt} + 2y\frac{dy}{dt} = 0$ ---->(2)

substitute the value of 'x', 'dx/dt' and 'y' in equation (2), we get the fast of the top of the ladder moving down when the foot of the ladder is 3 feet from the wall

$2(3)(2) + 2 (11.61)\frac{dy}{dt} = 0$

12 + 23.22 $\frac{dy}{dt}$ = 0

$\frac{dy}{dt}= \frac{-12}{23.22}$

$\frac{dy}{dt} = -0.518$

Hence, using Pythagoras theorem the top of the ladder moving down when the foot of the ladder is 3 feet from the wall is of -0.518 feet/sec.

Learn more about Pythagoras theorem here

brainly.com/question/21511305

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5 0

2 years ago