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4 years ago

Please I need help asap.

Mathematics

1 answer:

Burka [1]4 years ago

4 0

QR is the median of the trapezoid, so its length is the average of the top and bottom bases. Write that. Say (length of QR)=1/2 of (length of the top + length of the bottom). That gives you a nice simple equation that you can easily solve for 'x'.

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What is the slope-intercept form of the linear equation x + 4y = 12?

lesya692 [45]

Answer:

Step-by-step explanation:

x is always equal to 1

Slope intercept form is x + 4y =12 where x (1) is slope and 4y is the y-intercept.

4 0

3 years ago

Evaluate using the finite geometric sum formula

Sever21 [200]

Answer:

$S_9=-18.703$ .

Step-by-step explanation:

The given series is,

$\sum_{i=1}^9(-\frac{1}{2})^{i-1}$

When we substitute $i=1$ , we get the first term, which is $a_1=-28(-\frac{1}{2})^{1-1}$

This implies that,

$a_1=-28(-\frac{1}{2})^{0}$

$a_1=-28(1)=-28$ .

The common ratio is

$r=-\frac{1}{2}$

The finite geometric sum is given by the formula,

$S_n=\frac{a_1(r^n-1)}{r-1} , -1\:$ .

Since there are 9 terms, we find the sum of the first nine terms by putting $n=9$ in to the formula to get,

$S_9=\frac{-28((-\frac{1}{2})^9-1)}{-\frac{1}{2}-1}$ .

$S_9=\frac{-28((-\frac{1}{512})-1)}{-\frac{3}{2}}$ .

$S_9=\frac{-28(-\frac{513}{512})}{-\frac{3}{2}}$ .

$S_9=-28(\frac{171}{256})$ .

$S_9=-\frac{1197}{64}$ .

$S_9=-18.703$ .

The correct answer is B

4 0

3 years ago

Read 2 more answers

Write 9/5 as a decimal

Oxana [17]

9/5 as a decimal is 1.8

4 0

3 years ago

Read 2 more answers

A snail travels at a rate of 2.15 feet per minute . Write a rule to describe the function. b. How far will the snail travel in 7

Jobisdone [24]

15.05 feet in 7 min

2.15 x 7 = 15.05

3 0

3 years ago

Read 2 more answers

Two mechanics worked on a car. The first mechanic charged $45 per hour and the second charged $120 per hour. The mechanics worke

ankoles [38]

Answer:

the $45 per hour mechanic worked 2 hours

the $120 per hour mechanic worked 8 hours

Step-by-step explanation:

45 X 2 = 90

120 X 8 = 960

960 + 90 = 1050

4 0

3 years ago