−1.5(4−n)+2.8 simplified is???

Mathematics

1 answer:

ella [17]2 years ago

4 0

Answer: No

Step-by-step explanation:

You have to do the Distributive Property.

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How to write the slope-intercept form of the equation of the line through the given points: (-1,-3) and (-4,5)

zysi [14]

The slope-intercept form of a line is:

y=mx+b, where m=slope and b=y-intercept (value of y when x=0)

First you must find the slope, or m value.

m=(y2-y1)/(x2-x1), which is the change in y divided by the change in x. In this case:

m=(5--3)/(-4--1)

m=(5+3)/(-4+1)

m=8/-3

m=-8/3

So far our line is:

y=-8x/3+b, we can now solve for the y-intercept, or b, using any point on the line, I'll use (-4,5):

5=-8(-4)/3+b

5=32/3+b

15/3=32/3+b

15/3-32/3=b

-17/3=b

So now we know the value for both terms in our line:

y=(-8x-17)/3

4 0

3 years ago

Read 2 more answers

Can someone help me I will mark u brilliant

Ede4ka [16]

Answer:

Hello! answer: 20

Step-by-step explanation:

1/8 × 20 = 2 1/2 So the answer is 20 HOPE THAT HELPS!

3 0

2 years ago

Read 2 more answers

(b) The globe has a radius of 28.5 cm. Find the surface area of the globe. Round your answer to two decimal places. Use:

damaskus [11]

Answer:

$\boxed {\boxed {\sf 10,207.03 \ cm^2}}$

Step-by-step explanation:

Surface area is the total area of the surface of an object. A globe is a sphere and the formula for calculating a sphere's surface area is:

$SA= 4 \pi r^2$

The radius (r) of the globe is 28.5 centimeters. Substitute this value into the formula.

r= 28.5 cm

$SA= 4 \pi ( 28.5 \ cm)^2$

Solve the exponent. Multiply the number by itself.

(28.5 cm)²= 28.5 cm * 28.5 cm = 812.25 cm²

$SA= 4 \pi (812.25 \ cm^2)$

Multiply 4, pi and 812.25 centimeters together.

$SA= 12.56637061 (812.25 \ cm^2)$

$SA= 10207.03453 \ cm^2$

Round to two decimal place or the hundredth place. The 4 in the thousandth place to the right (10207.03453) tells us to leave the 3 in the hundredth place (10207.03453).

$SA \approx 10207.03 \ cm^2$