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Crazy boy [7]
3 years ago
13

How to solve these questions?!​

Mathematics
1 answer:
viktelen [127]3 years ago
3 0

Answer:

1. x + 4 = 9

Hint: the word 'sum' generally refers to addition.

2. 10<em>a</em> = 70

3. \frac{3}{4} t = 15

4. \frac{1}{4} x - 4 = 4

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Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. One of the x-interc
Marina CMI [18]
3x^2 + 6x - 10 = 0
3(x^2 + 2x) - 10 = 0
3[ (x + 1)^2 - 1 ] - 10 = 0
3(x+1)^2 - 13 = 0

so the vertex is at (-1,-13)
the roots will be same distance from x = -1
that is a distance 1.08 --1 = 2.08

so other root is approximately  -1 -2.08 = -3.08

the other intercept is at (-3.08,0)
5 0
3 years ago
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A car was purchased for $20,000 new. Each year, you can expect the car to
alexandr1967 [171]

Answer:

It will be worth 16k in 10 years

Step-by-step explanation:

divide 20k by 100

1% = 200 dollars

200 x 8 gives you 1.6k

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3 0
3 years ago
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Te: 6 less then a number cubed
telo118 [61]

Answer:

x^ 3 -6

Step-by-step explanation:

x^ 3- 6

cubed x first. then subtract 6 from that

6 0
3 years ago
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If the ratio of y to x is equal to 3 and the sum of y and x is 80, what is value of y
Rus_ich [418]

Answer:

y = 60

Step-by-step explanation:

<h3>Step 1: Make sense of the given</h3>

"The ratio of y to x is 3"

This means that, y\div x=3

"The sum of y and x is 80"

This means,  x+y=80

<h3>Step 2: Make use of the facts</h3>

If y\div x=3, then y = (3*x).

We can plug this into the other equation by substitution:

x + (3 * x)=80

This simplifies to:

4x = 80

Which we can solve out and get:
x=20.

<h3>Step 3: Plug and Chug</h3>

We solved for x, but we need the value of y.

So, we go back to the equation we first derived: "y = (3*x)".

And now we substitute the value of x, into this.

y = (3 * (20))

By solving this out, we get:
y=60

So, the value of y is 60.

3 0
2 years ago
What is the fourth term of a number pattern that begins with 250 and subtracts 13? A. 211 B. 224 C. 198 D. 302
Alina [70]

Create the equation:

250-13x

Plug in 4 for the equation and solve:

250-13(4)

250-52

198

The answer is C. 198

3 0
3 years ago
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