Which expression has a negative value A. 2+12 B. (-3)(-8) C. 10-(-18) D. -35÷5

Mathematics

2 answers:

alina1380 [7]3 years ago

6 0

Answer:

It's D

Step-by-step explanation:

marissa [1.9K]3 years ago

4 0

Answer:

D.) -35÷5

Step-by-step explanation:

A.) 2+12=14

B.) (-3)(-8)=24 (A negative number times a negative number is positive.)

C.) 10-(-18) = 28 (Negative minus is plus.)

D.) -35÷5 = -7 (A negative number times or divided by a positive number results in a negative number.)

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Just 24 plz, I am struggling

Bingel [31]

check the pictured below.

now, notice that APB is just a flat-line and therefore those two angles there add up to 180°.

also notice that since ∡ACB is 90°, then those two angles add up to that much.

$\bf \stackrel{\measuredangle ACP}{(3x+2y)}+\stackrel{\measuredangle BCP}{(3x+4y)}=90\implies 6x+6y=90\implies \stackrel{\textit{common factor}}{6(x+y)}=90
\\\\\\
x+y=\cfrac{90}{6}\implies x+y=15\implies \boxed{x=15-y}
\\\\[-0.35em]
~\dotfill$

$\bf \stackrel{\measuredangle APC}{(7x+3)}+\stackrel{\measuredangle BPC}{(16y)}=180\implies 7x+16y=177\implies 7\left( \boxed{15-y} \right)+16y=177
\\\\\\
105-7y+16y=177\implies 9y=72\implies y=\cfrac{72}{9}\implies \blacktriangleright y=8 \blacktriangleleft
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
\measuredangle BPC=16(8)\implies \measuredangle BPC=128$