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e-lub [12.9K]
3 years ago
14

Please help me understand this step by step. FOR BRAINLIEST Evaluate x^2 + 2x - 4 if x= -4

Mathematics
2 answers:
Luda [366]3 years ago
8 0

Answer:

Step-by-step explani think its power 10 wizard cards

ation:

Rufina [12.5K]3 years ago
4 0

Answer:

Step-by-step explanation:

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What is the value of x?
Usimov [2.4K]

Answer:

All angles in a triangle sum up to 180 degrees.

So, 63+71+x=180 degrees.

You add like terms: 134, and then add x.

134+x=180 degrees.

Minus x from both sides.

180-134=x.

What do you think x is?

3 0
3 years ago
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Based on the attendance at past picnics, Luis expects 95% of the students in his class to attend this years picnic. If 120 stude
Sever21 [200]

Answer:

95 / 100 * 120 = 114 students

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6 0
3 years ago
Is math important in real life?
Dmitrij [34]
Yes- though we may say "When will we ever use this?" ever so often in class, the reality is that we use mathematics in everyday life. From simple addition, to factoring, to finding the angles of various components to a building, math is always being used in real life.
6 0
3 years ago
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the germination rate for zinnia seeds is 78%. this means that 78 out of every 100 seeds will sprout and grow. if james wants 60
Harlamova29_29 [7]

Answer: 77 seeds


Step-by-step explanation:

Given: The germination rate for zinnia seeds =78%

Let x be the total number of seeds he planted, then

The seeds germinated= 78% of x

⇒The seeds germinated= 0.78x

If James wants 60 zinnia plants for his yard, then it will give the equation

0.78x=60\\\Rightarrow\ x=\frac{60}{0.78}\\\Rightarrow\frac{6000}{78}\\\Rightarrow\ x=76.92307\aprrox77

Hence, he should plant 77 seeds .


5 0
3 years ago
Can someone help me find the length of b of the unknown side in this triangle? Thanks! :)
creativ13 [48]

Answer: 4

Step-by-step explanation:

Using pythagoras theorem =>

b=\sqrt{c^2-a^2

b=\sqrt{5^2-3^2}

b=\sqrt{25-9}

b=\sqrt{16}

b=4

7 0
3 years ago
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