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3 years ago

Which expression is equivalent to 12 - 4 ?

Mathematics

1 answer:

Anit [1.1K]3 years ago

4 0

Answer:

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Write expression

12 - 4

Step 2: Subtract

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Henry bought 3 sets of pencils. After he bought the pencils, his account balance showed a change of –$30.63. What would have bee

Alex

30.63 for 3 sets of pencils......that means each set cost (30.63 / 3) =
10.21....so the change in his account for 1 set of pencils is -$ 10.21 <=

5 0

3 years ago

Read 2 more answers

Trina planted plants in her garden last week. She planted twice as many cucumbers as zucchini and eight more tomatoes than cucum

maxonik [38]

Answer:

7 Zuchini, 14 Cucumbers and 22 Tomatoes plants.

Step-by-step explanation:

Let the number of tomatoes=t
Let the number of cucumber planted=c
Let the number of zucchini planted=z
Total Number of Plants=43

She planted twice as many cucumbers as zucchini, this is written as:

c=2z

She also planted eight more tomatoes than cucumbers, this is written as:

t=c+8=2z+8

In total, she planted 43 plants

Therefore:

z+(2z)+(2z+8)=43

5z+8=43

5z=43-8

5z=35

Divide both sides by 5

z=7

Number of Cucumbers, c=2z=2 X 7 =14

Number of Tomatoes, t=c+8=14+8=22

Therefore, she planted 7 Zuchini, 14 Cucumbers and 22 Tomatoes plants.

3 0

3 years ago

A 75% increase followed by a 33 1/2% decrease

o-na [289]

After 75% increase followed by a 33 1/2% decrease the net increased is 16.375%.

<u>Solution:</u>

Need to determine net percentage increase or decrease when a value is increased by 75% and then decreased by $33 \frac{1}{2} \%$ that is 33.5%.

Let’s assume initial value be represented by variable x.

$75 \% \text { decrease means } x+75 \% \text { of } x=x+\frac{75}{100} x=x+0.75 x=1.75 x$

Now there is decrease of 33.5%

$\begin{array}{l}{33.5 \% \text { decrease means } 1.75 x-33.5 \% \text { of } 1.75 x=1.75 x-\frac{33.5}{100} \times 1.75 x} \\\\ {=1.75 x-(0.335 \times 1.75) x=1.75 x-0.58625 x} \\\\ {=1.16375 x}\end{array}$

$\text { So increase in percentage }=\frac{\text { final value-initial value}}{\text { intial value }}$

$=\frac{1.16375 x-x}{x} \times 100=16.375 \%$

Hence after 75% increase followed by a $33 \frac{1}{2} \%$ decrease the net increased is 16.375%.

8 0

3 years ago

AC is a tangent to the circle below at point B. Calculate the sizes of angle x, angle y and angle z. Justify each of your answer

mafiozo [28]

$y=78^{\circ}$ (alternate interior angles theorem)

$x=78^{\circ}$ (alternate segment theorem)

$z=24^{\circ}$ (angles in a triangle add to 180 degrees)

3 0

2 years ago

Can somebody help me pls

IgorLugansk [536]

Answer:

C. 37

Step-by-step explanation:

winindoutpickc

7 0

3 years ago