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2 years ago

I and my friends can't find the answer to this and we need help pls.

Mathematics

1 answer:

Lorico [155]2 years ago

6 0

The answer is A
......

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If b² = 25, then b =____

GREYUIT [131]

Answer:

Step-by-step explanation:

b^2= (5)^2 = 25

So.... b=5 or -5

5 0

2 years ago

Read 2 more answers

The length of a bridge on a map is 1.5 cm. What is the actual length of the bridge in meters if the map is drawn at a scale of 1

Vitek1552 [10]

Answer:

The actual length of the bridge is 600 meters

Step-by-step explanation:

we know that

The scale on a map is

$\frac{1}{40,000}$

That means

1 unit on a map represent 40,000 units in the actual

1 cm on a map represent 40,000 cm in the actual

Remember that

$1/ m=100/ cm$

$40,000\ cm=40,000/100=400\ m$

we can rewrite the scale as

$\frac{1}{400}\frac{cm}{m}$

using proportion

Find out the actual length of the bridge in meters if the length of a bridge on a map is 1.5 cm.

Let

x ----> the the actual length of the bridge in meters

$\frac{1}{400}\frac{cm}{m}=\frac{1.5}{x}\frac{cm}{m}\\\\x=400(1.5)\\\\x=600\ m$

6 0

3 years ago

Find the surface area of the composite figure.

KengaRu [80]

can any one answer i need help with this question

4 0

2 years ago

A polynomial has x-intercepts of 3, 0, and –1, and passes through the point (1, –8). Which of the following functions could repr

Brilliant_brown [7]

Answer:

option 4

Step-by-step explanation:

Given the x- intercepts say x = a, x = b, x - c then the corresponding factors are

(x - a), (x - b), (x - c) and the polynomial is the product of the factors

Here the x- intercepts are x = 3, x = 0, x = - 1, thus the factors are

(x - 3), (x - 0), (x - (- 1) , that is

(x - 3), x and (x + 1) , then

y = ax(x - 3)(x + 1) ← where a is a multiplier

To find a substitute (1, - 8) into the equation

- 8 = a(1 - 3)(1 + 1) = - 4a ( divide both sides by - 4 )

a = 2, thus

y = 2x(x - 3)(x + 1) ← expand factors using FOIL

= 2x(x² - 2x - 3) ← distribute by 2x

= 2x³ - 4x² - 6x

3 0

3 years ago

A committee is to consist of two members. If there are seven people available to serve on the committee, how many different comm

ankoles [38]

3
Though there are seven people, it would only be 3 full committees. They would either find an eighth person or have a group of 3 with one of the committees.
Hope this helps!

7 0

2 years ago