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2 years ago

Help me plz help me plz ??

Mathematics

2 answers:

Oduvanchick [21]2 years ago

7 0

Answer:

I just want points hahahaha

hram777 [196]2 years ago

6 0

Y=2X+7 because you’re adding 2 to every section. I hope this helps you unlike that other guy who answered the question just for points.

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The base of a triangle exceeds the height by 7 centimeters. If the area is 400 square centimeters, find the length of the base a

zvonat [6]

Answer:

Base = 32 cm

Height = 25 cm

Step-by-step explanation:

Area of a triangle can be calculated as:

$Area = \frac{1}{2}\times Base \times Height$

We are given that the base of triangle exceeds the height by 7 cm. This can be expressed in an equation form as:

Base = Height + 7

Lets use B to represent base and H to represent height

B = H + 7

The equation of area can be stated as:

$Area=\frac{1}{2}bh\\\\ Area=\frac{1}{2}(h+7)(h)\\\\ 400=\frac{1}{2}h(h+7)\\\\ 800=h^{2}+7h\\\\ h^{2}+7h-800=0$

This is a quadratic equation which can be solved using a quadratic equation as shown below:

$h=\frac{-7+-\sqrt{49-4(1)(-800)} }{2(1)} \\\\ h=\frac{-7+-57}{2}\\\\h=-32,25$

Since the height cannot be negative, we'll consider the positive value only i.e height is equal to 25 cm.

Therefore, the length of base will be 25 + 7 = 32 cm.

8 0

3 years ago

Pls help <br> -21 ÷ b = 3, b = ? and uhm this one too<br> 3c + 1 = 10, c = ?

AfilCa [17]

Answer:

-21 ÷ b = 3, b = b=-7

3c + 1 = 10, c = c=1/7

Hope this helps!

5 0

2 years ago

Someone please help me

SOVA2 [1]

Gosh, when I saw that my mind went blank

6 0

2 years ago

Is the product of two integers positive, negative, or zero? How can you tell?

marishachu [46]

Answer:

When you multiply a negative number by a positive number then the product is always negative. When you multiply two negative numbers or two positive numbers then the product is always positive. 3 times 4 equals 12. Since there is one positive and one negative number, the product is negative 12.

Step-by-step explanation:

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2 years ago

I DONT CARE IF YOU LOOK THIS UP JUST DO THE CORRECT ONE ON THE SOURCE AND BEST STARS: https://brainly.com/question/7807259

salantis [7]

Answer:

60% heads

Step-by-step explanation:

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2 years ago