3 years ago

Factorise FULLY and show working out (3)

Mathematics

1 answer:

olchik [2.2K]3 years ago

4 0

$48-3x^2=-3(x^2-16)=-3(x-4)(x+4)$

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Solve 3(x-4)=12x ......

lesantik [10]

Answer:

The answer is x= -4/3

Step-by-step explanation:

3(x-4)=12x

=3x-12=12x

=3x-3x-12=12x-3x

-12=9x

To find x divide both sides by 9.

-12÷9=9x÷9

-4/3=x

8 0

3 years ago

Mark had 14 problems wrong on his test. his score was 72% correct. how many problems were on the test?

ella [17]

Let x = number of problems on test
If he got 14 wrong, then x - 14 is the number correct.
$\frac{x-14}{x} = .72
$
x - 14 = .72x
.28x - 14 = 0
.28x = 14
x = 50

The test consisted of 50 problems.

4 0

4 years ago

Which expression is equivalent to 24 ⋅ 2−7? 1 over 2 to the power of 11 1 over 2 to the power of 3 23 211

lawyer [7]

I over 2 to the power 11

5 0

3 years ago

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joe scored less than four times the amount of baskets peter scored. How many did they each score if l together they scored 32 ba

slava [35]

Let us assume the amount of baskets Joe scored = x baskets.

4 times of x is 4x.

4x+x = 5x.

Therefore, Peter scored = 5x.

Together they scored = 32 baskets.

Sum of Peter score and Joe score = 32.

x+5x = 32.

6x = 32.

Dividing both sides by 6, we get

x = 32/6

= 16/3.

x= 16/3.

<h3>Joe scored = 16/3 baskets.</h3><h3>Peter scored = 5 × 16/3 = 80/3 baskets.</h3>

6 0

3 years ago

Find the slope of the line (Image attached)<br><br> A) 5<br> B) -5<br> C) 1/5<br> D) -1/5

Inessa [10]

The slope is 1/5 as [rise/run]

7 0

4 years ago

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