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3 years ago

PLSSS I NEED THE ANSWER

Mathematics

1 answer:

BabaBlast [244]3 years ago

6 0

Answer:

1. 6.4 meters of streamers left to make pompoms

2. He will be able to make 8 pompoms

Step-by-step explanation:

4 x 1.6 = 5.6 meters were used to make decorations.

Then we do 12 - 5.6 = 6.4

per one pompom it takes 0.8 meters of streamers.

6.4 is the left over so we do

6.4 divided by 0.8 = 8 pompoms you can make

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5. The mapping f: xax² + bx + c defined on the set of real numbers is such that f(0) = -4,f(1)-1 and/(-1)= -5. Find a, b and c.

Marrrta [24]

It looks like you're saying

$f(x) = ax^2 + bx + c$

and you're asked to find $a,b,c$ given $f(0)=-4$ , $f(1)=-1$ , and $f(-1)=-5$ .

Evaluate $f$ at the three given points:

$x=0 \implies f(0) = \boxed{c = -4}$

$x=1 \implies f(1) = -1 = a + b + c \implies a+b = 3$

$x=-1 \implies f(-1) = -5 = a - b + c \implies a - b = -1$

$(a+b) + (a-b) = 3 + (-1) \implies 2a = 2 \implies \boxed{a=2}$

$a-b = -1 \implies \boxed{b=3}$

and the mapping is $f(x) = 2x^2 + 3x - 4$ .

5 0

2 years ago

(The choices for the first one is 90 or 180)

creativ13 [48]

1. 180
2. 1&4
3. 1
the answer to the question

7 0

3 years ago

If 3x + 2y= 14 and 5x + 3y = 12, then find the value of 5x- y.

Ksju [112]

I think the answer would be negative 124 NOT SURE

6 0

2 years ago

ian invested an amount of money at 3% per annum compound interest. At the end of 2 years the value of the investment was £2652.2

Scorpion4ik [409]

Answer:

the amount of money Ian invested is P = £2,500

Step-by-step explanation:

The standard formula for compound interest is given as;

$A = P(1+r/n)^{nt} \\P = \frac{A}{(1+r/n)^{nt}} ...........1\\$

Where;

A = final amount/value

P = initial amount/value (principal)

r = rate yearly

n = number of times compounded yearly.

t = time of investment in years

For this case, Given that;

A = £2652.25

t = 2 years

n = 1 (semiannually)

r = 3% = 0.03

substituting the given values into equation 1;

$P = \frac{A}{(1+r/n)^{nt}} ...........1\\P = \frac{2652.25}{(1+0.03)^{2}} \\P = \frac{2652.25}{(1.03)^{2}} \\$

P = £2,500

the amount of money Ian invested is P = £2,500

8 0

3 years ago

STUDY<br> 1. Simplify the expression below<br> 5p + 14p<br> 4(x - 2) + 6x<br> 2. Evaluate

melisa1 [442]

Answer:

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Step-by-step explanation:

3 0

3 years ago

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