All categories

3 years ago

Use a fives fact to help you solve 7x6.

Mathematics

1 answer:

DanielleElmas [232]3 years ago

3 0

Answer:

Step-by-step explanation:

Since 7x5=35, then 7x6=42. This is known as the fives fact rule, and I used it to figure it out.

Hope this helps! :)

You might be interested in

The lengths of the sides of a triangle are given below. Classify the triangle as acute, obtuse, or right.

enot [183]

Answer:

B. Obtuse Triangle

Step-by-step explanation:

Use Pythagorean to identify if the triangle is right:

9² = 7² + 3²
81 = 58

We see the triangle is not right and the difference of the squares tells us the angle opposite to side with measure of 9 is greater than 90°.

It means the triangle is obtuse.

Correct choice is B

8 0

3 years ago

How do you do this???!!

PIT_PIT [208]

Answer:

you try to find what goes in the blank to get 88,356

Step-by-step explanation:

5 0

3 years ago

A farm distributor packed 2,650 melons in boxes.each box can hold 8 melons. All the boxes are full except for one box.

laiz [17]

Answer:

there are 331 full boxes but the one box that isnt full has two melons

Step-by-step explanation:

2,650 divided by 8 = 331

331 multiplied by 8 = 2648

2650 - 2648 = 2

so there are 332 boxes total 331 full ones and one not full on with 2 melons in it.

Hope that helps!

7 0

3 years ago

Geometry . Cosines / sines. Find a and round to the nearest 10th

Lorico [155]

This is the good part of Trigonometry, actually measuring triangles. It's much better than all the identities around sine and cosine and the rest, which actually have more to do with circles than triangles.

This part of trig has a short menu:

Law of Cosines. Three ways to write it, one is $c^2 =a^2+b^2-2ab \cos C$

Law of Sines: $\dfrac{a}{\sin A} = \dfrac{b}{\sin B} = \dfrac{c}{\sin C}$

Triangle angles: $A+B+C=180^\circ$

and two special cases of the Law of Cosines, the Pythagorean Theorem

$C=90^\circ, \quad \quad c^2=a^2+b^2$

and the Collinear Points Theorem:

$C=180^\circ, \quad \quad c^2=a^2+b^2 - 2 a b \cos 180^\circ = a^2+b^2+2ab=(a+b)^2$

$c = a+b$

Here we choose Triangle Angles followed by Law of Sines:

A = 180 - 105 -15 = 60 degrees

$\dfrac{a}{\sin 60^\circ}= \dfrac{2}{\sin 105^\circ}$

$a= \dfrac{2 \sin 60^\circ}{\sin 105^\circ} = 1.793...$

Answer: 1.8 cm

When I was a student we'd be expected to get $\sin 105^\circ$ exactly and get

$a = 3 \sqrt{2} - \sqrt 6$

But that was before online homework.

5 0

3 years ago

I need help with this math questions can anyone help Thanks. Can u help me on #1 and#2

Fynjy0 [20]

1.
yes
x is number of group acts
y is number of indivual acts

2. I would eliminate x by multiplying 2nd equation by -3 then adding

12x+6y=120
-12x-3y=-90 +
0x+3y=30

3y=30
divide by 3
y=10

sub
4x+y=30
4x+10=30
4x=20
divide 4
x=5

each group act takes 5 mins and each individual takes 10 minutes

4 0

3 years ago