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Veseljchak [2.6K]
3 years ago
13

(-4f + 9) - (8f + 9) = Math pls help

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
4 0

Answer:

-12f

Step-by-step explanation:

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a plane intersects a sphere 5 cm away from the center of the sphere. the cross section is a circle whose diameter is 12cm. deter
podryga [215]

Answer:

7.81 cm

Step-by-step explanation:

diameter = 12, 12/2 = 6

(r+5)(r-5) = 6 * 6

r^2 - 25 = 36

r^2 = 61

r = 7.81

radius = 7.81 cm

7 0
2 years ago
Read 2 more answers
Factor the expression completely 8y - 36
Marina86 [1]

ALL yourr doing is just adding 8 and 36

y= 4\frac{1}{2} or y= 4.5

8 0
3 years ago
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A=-2(negative 2) b=3 and c=5 what is 3ac-a+2b.With explanation
KIM [24]

Step-by-step explanation:

a = -2

b = 3

c = 5

<h2>Question:</h2>

3ac - a + 2b

= Solution,

= 3 ( - 2 ) × 5 - ( - 2 ) + 2 × 3

here ... ( + ) × ( - ) = ( - )

= - 6 × 5 - ( - 2 ) + 2 × 3

here .... ( - ) × ( - ) = ( + )

= - 6 × 5 + 2 + 2 × 3

= - 30 + 2 + 6

= - 30 + 8

here the ( - ) have greater variable so...

= - 22

hence - 22 is the answer . ....

6 0
2 years ago
A pizza had 9/10 left before Lucas ate 4/5 of the pizza. How much pizza is left over?
Allushta [10]

Step-by-step explanation:

always try to bring fractions you need to compare to the same denominator (bottom number).

we have 9/10 of the pizza left.

then 4/5 if the pizza are eaten.

how to compare 9/10 with 4/5 ?

by bringing 4/5 also to a fraction of 10ths.

what do I need to multiply 5 with to get 10 ?

right, 2.

since we don't want to change the overall value of the original fraction, we need to multiply both levels (numerator and denominator) by that same factor :

4/5 × 2/2 = 8/10

aha !

that we can compare with 9/10.

so, when Lucas ate 4/5 (= 8/10) of the pizza, when there was originally 9/10 left, then we have 1/10 of the pizza left.

5 0
3 years ago
Evaluate the numerical expression. 2/ 3 − (− 1/ 6 )
dusya [7]

Answer:

1/3

Step-by-step explanation:

7 0
3 years ago
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