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Sergeu [11.5K]
3 years ago
10

Place parenthesis

Mathematics
1 answer:
ozzi3 years ago
5 0

9514 1404 393

Answer:

  7+(7–7) ÷(7+7•7)= 7

Step-by-step explanation:

The difference 7 - 7 provides an opportunity to zero out everything to its right. That's what we've done in this version:

  7 +(7 -7) ÷ (7 +7×7) = 7 . . . our version of the equation

  7 +0 ÷ (7 +49) = 7 . . . . . multiplication inside parentheses first

  7 +0 ÷ 56 = 7 . . . . . . . . parentheses first

  7 +0 = 7 . . . . . . . . . . . . division before addition

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At a certain time of day, a 30-foot building casts a 10 foot shadow. How tall is a person who casts a 2 foot shadow?
Anni [7]

Answer:

C)  6 feet

Step-by-step explanation:

set up a proportion of height/shadow = height/shadow

30/10 = h/2

cross-multiply:

10h = 60

h = 6

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2 years ago
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3 years ago
Pls answer ASAP this is due in the next hour
kari74 [83]

Answer:

M is not parellel to N because they do not create supplementary angles with the lines that it passes through.

J and K are parallel to each other because they create supplementary angles with line m

supplementary angles add up to 180 and if parallel lines create supplementary angles with the line they cross then they are parallel to each other if that makes sense

105+75=180

Step-by-step explanation:

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2 years ago
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Please help me!!
ipn [44]

{\color{chartreuse}{Measure\:of\: ∠\:on\: one\: side\:of\:line\:=\:180°}}

∠ Given are (x + 18)° , x° , 4x° and one Angle is 90° as per diagram

Let ,

1st∠ = (x + 18)°

2nd∠ = x°

3rd∠ = 4x°

so ,

⟶\:(x \:+\: 18)°\:+\:x°\:+\: 4x°\:+\:90°\:=\:180°

⟶\:6x°\:+ \:18°\:+\:90°\:=\:180°

⟶\:6x°\:+ \:108°\:=\:180°

⟶\:6x°\:=\:180°\:-\:108°

⟶\:6x\:=\:72°

⟶\:x\:=\:\frac{72}{6} \\

⟶\:x\:=\:12°

substituting x = 12 at the place of x .

= x° + 18°

= 12° + 18 °

1st∠ = 30°

__________________________________

= x°

2nd∠ = 12°

__________________________________

= 4x°

= 4(12)°

3rd∠ = 48°

7 0
2 years ago
Jose is baking cakes. He needs 3/4 of butter for each cake. One stick of butter is a 1/2 of a cup. How many sticks do he need to
Anastaziya [24]

Answer: 6 sticks

Step-by-step explanation:

Given

Joe needs \frac{3}{4} butter for each cake

One stick of butter is equivalent to 0.5 cup

So, joe need

\dfrac{3}{4}\times \dfrac{1}{2}=\dfrac{3}{8}\ \text{cup}

for each cake

To bake 8 cakes, it is

\Rightarrow \dfrac{3}{4}\times 8=6\ \text{sticks}

3 0
2 years ago
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