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2 years ago

Please help me. Thank you!

Mathematics

1 answer:

olga_2 [115]2 years ago

7 0

Answer:

-4, -4, 3, 8, 8

Step-by-step explanation:

-4(5+(-2))=-4(5)+-4(-2)

This is because of the distributive property. You have to distribute the 4 to the 5 and the -2.

-4(3)=-20+8

This is because since both the 5 and the -2 are being multiplied by -4, you can combine the 5 and the -2 to get 3 and then multiply that by -4.

This means (-4)(-2)=8

This is because (4)(2)=8 and two negatives make a positive.

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Last question then I’ll be done I’m pretty sure. Please help and I’ll mark brainliest if it lets me. Just give me a small explan

almond37 [142]

Answer:

B is the right answer I am sure

3 0

2 years ago

Given cos ⁡ ( θ ) = 5/6 , then sin ⁡ ( θ ) = a/b .<br><br> Determine the values of a and b.

slega [8]

Answer:

a = √11 and b = 6

Step-by-step explanation:

Refer to attached picture for reference

for an right triangle with angle θ

we are given

cos θ = 5/6 = length of adjacent side / length of hypotenuse

hence

adjacent length = 5 units

hypotenuse length = 6 units

the missing side is the "opposite" length which we can find with the Pythagorean equation. in our case:

hypotenuse ² = adjacent ² + opposite² (rearrange)

opposite ² = hypotenuse ² - adjacent ²

opposite ² = 6² - 5²

opposite = √ (6²-5²) = √11

sin θ = opposite length / hypotenuse (substitute values above)

sin θ = √11 / 6

hence a = √11 and b = 6

3 0

2 years ago

A car starts from an initial velocity of 10m/s and accelerates at 2.5m/s².how long will it take the car to reach a speed of 40m/

PIT_PIT [208]

A=(v-u)/t
We know a=2.5, v=40, u=10, so:
2.5=(40-10)/t
2.5t=40-10
2.5t=30
Divide both sides by 2.5
t=12 It takes 12 seconds for the car to reach 40m/s

To find out how far it went, you do:
d=v+1/2 at^2
d=10+1/2(2.5)(12)^2
d=10+1/2(2.5)(144)
d=10+(1.25)(72)
d=10+90
d=100m

Hope this helps :)

7 0

3 years ago

Help last one thank you

loris [4]

48-2x=96--------- -2x=48--------- x=-24. You multiply everything by 6 then solve.

8 0

3 years ago

Find the greatest common factor of 15 x²y³ and -18 x³yz .

Masteriza [31]

Answer:

3 x² y¹

Step-by-step explanation:

15 x²y³ = 3. 5. x². y³

-18x³yz = -2. 3². x³. y¹. z¹

so, the GCF = 3. x². y¹

7 0

3 years ago

Read 2 more answers