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2 years ago

Find the mistake: two-step equations

Mathematics

2 answers:

kirill [66]2 years ago

8 0

Answer:

Ling did not make a mistake.

Step-by-step explanation:

$\bf -2q+11=-32$

$\bf -2q=-43$ (Step 1)

$\bf q=21.5$ (Step 2)

First step, Ling subtracted 11 from both sides which's correct.

Then she divided each side of the equation by -2. correct*

Hence, Ling didn't make a mistake.

_____________________

Bezzdna [24]2 years ago

6 0

Ling did not make a mistake

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steven has a rectangular rug with a perimeter of 16 feet the width of the rug is 5 feet what is the length of the rug

stich3 [128]

So perimeter is equal to 2 lengths and 2 width so the equation would be P=2L+2W. you know width so you plug in 5 for W then solve for L and you should get L=3

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3 years ago

Robbie, has scored 120 so far this season. He has scored all of his points on 1-point extra point kicks and 3-point field goals.

joja [24]

Answer:

39 and 27

Step-by-step explanation:

GIVEN: Robbie, has scored $120$ so far this season. He has scored all of his points on $1$ -point extra point kicks and $3$ -point field goals. He has made a total of $66$ kicks.

TO FIND: How many of each kick has he made.

SOLUTION:

Lets extra point kicks made by Robbie be $x$

points scored using extra point kick $=1$

field goal kicks made by Robbie $=66-x$

point scored using field goal kick $=3$

Total points scored by Robbie $=120$

Total points scored are the sum of points scored by extra point kicks and field goal kicks.

$1\times x+(66-x)3=120$

$198-2x=120$

$2x=78$

$x=39$

total extra point kicks $=39$

total field goal kicks $=66-39=27$

Hence Robbie made 39 and 27 kicks of extra point kick and field goal kicks respectively.

6 0

3 years ago

Read 2 more answers

The piper family arrived at the campground at the time shown on the clock. I took the family 2 hours and 15 minutes to get to th

aleksklad [387]

Answer:

As you included no picture, I do not know the time on the clock. We can however, work with assumed figures which you can then relate to your question.

Assuming the time on the clock was 10:45 am, if the family took 2 hours and 15 minutes to get to the camp ground, simply subtract this from 10:45 to find out what time they arrived.

Subtract the 2 hours from 10am:

= 10 - 2

= 8am

Subtract the 15 minutes from 45:

= 45 - 15

= 30

Put that together:

= 8:30 am

<em>They left their house at 8:30 am using this scenario. </em>

8 0

3 years ago

What is the equation of a line perpendicularto y=-2/5x-1 that passes through(2,-8)

Andrews [41]

<h2>Answer: y = ⁵/₂ x - 13 OR y + 8 = ⁵/₂ x - 5 </h2>

<h3>Step-by-step explanation:</h3>

<u>Find the slope of the perpendicular line</u>

When two lines are perpendicular, the product of their slopes is -1. This means that the slopes are <em>negative-reciprocal</em>s of each other.

⇒ if the slope of this line = - ²/₅

then the slope of the perpendicular line (m) = ⁵/₂

<u>Determine the equation</u>

We can now use the point-slope form (y - y₁) = m(x - x₁)) to write the equation for this line:

⇒ y - (-8) = ⁵/₂ (x - 2)

∴ y + 8 = ⁵/₂ (x - 2)

We can also write the equation in the slope-intercept form by making y the subject of the equation and expanding the bracket to simplify:

since y + 8 = ⁵/₂ (x - 2)

y = ⁵/₂ x - 13

7 0

3 years ago

Look at picture above it is worth 10 points.

maria [59]

B, when you each equal to zero, x will equal your solution set.

3 0

3 years ago

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