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3 years ago

Help me with my test

Mathematics

1 answer:

pychu [463]3 years ago

5 0

Answer:

Step-by-step explanation:

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How to find the b in the y=mx + b

Ber [7]

-1= (2)(7)+b
-1=14+b
B=-15

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3 years ago

The diameter of a circle is 18 inches. What is the length of a 90° arc?

Alona [7]

Answer:

AHH! Geometry!

14.1375

Step-by-step explanation:

So to get the answer, we are going to have to make a "factor"

We first do this:(Circles have an angle of 360)

$\frac{90}{360} =\frac{1}{4}$

This tells how long the arc is in comparison to the circumference!

So let's solve the circumference!

$P=D\pi \\P=18\pi \\P=About 56.55$

Now, Multiply!

$56.55*\frac{1}{4} = 14.1375$

There we go!

Hope this helps!

See Ya!

5 0

4 years ago

Find the gradient of the line joining (-1,9) and (3,5)

givi [52]

$\rule{300}{1}\\\dashrightarrow\large\blue\textsf{\textbf{\underline{Given question:-}}}$

<em>Find the gradient of the line joining (-1,9) and (3,5)</em>

<em /> $\dashrightarrow\large\blue\textsf{\textbf{\underline{Answer and how to solve:-}}}$

Use the slope formula:-

$\boxed{\frac{y_2-y_1}{x_2-x_1}}$

Replace the letters with the numbers:-

$\boxed{\frac{5-9}{3-(-1)}}$

$\circ$ On simplification,

$\boxed{\frac{-4}{3+1}}$

$\circ$ On further simplification,

$\boxed{\frac{-4}{4}}$

$\circ\sf{SLOPE=-1}$

<h3>Good luck with your studies.</h3>

$\rule{300}{1}$

5 0

2 years ago

In January 2011 the rate of a VAT increased from 17.5% to 20% Work out the difference in price of a car worth £15000 + VAT due t

Jobisdone [24]

Answer:

£375

Step-by-step explanation:

The tax changed from 17.5% of the car's price to 20% of the car's price, an increase of 2.5% of the car's price.

The increased tax amount is ...

0.025 × £15000 = £375

The price of the car went up by £375 due to the increase in VAT.

3 0

4 years ago

What is the answer to 5 X 23 X2

mina [271]

Answer: 230

Step-by-step explanation:

5x23=115

115x2=230

8 0

3 years ago