3 years ago

Explain how to add 678 + 303 using mental math

1 answer:

4 0

Answer:

You add it in your mind.

Step-by-step explanation:

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Oxana [17]

I’m pretty sure that the answer is D

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3 years ago

butalik [34]

Answer

https://zoom.us/j/99385592884?pwd=ajVOcXZSbGcyT3N3N0kxQm5Zek81Zz09er:

Step-by-step explanation:

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3 years ago

Ket [755]

Answer:

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3 years ago

Sliva [168]

$a_1=11+(1-1)(4)=11+0=11\\\\a_2=11+(2-1)(4)=11+4=15$

so:

$a_2=a_1+\,?\\\\15=11+\,?\\\\\boxed{?=4}$

Answer B.

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3 years ago

Lemur [1.5K]

Answer:

The value of x is 7

Step-by-step explanation:

Complementary angles have a sum of 90°, therefore the equation to solve for x is:

∠1+∠2=90°

60°+5(x-1)°=90°

5(x-1)=30°

x-1=6

x=7

So the value of x is 7

3 0

2 years ago