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3 years ago

HELP I'm really bad at math

Mathematics

1 answer:

irga5000 [103]3 years ago

3 0

Answer:

18 1/2

Step-by-step explanation:

3 7/10 x 5 = 18 1/2

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The skate Sports Store offers 4-wheel and 5-wheel inline skates. On display in the store are the left skates for 17 different st

beks73 [17]

There are 6 skates in store with 5 wheels.

<h3>What is Equation?</h3>

Equations are mathematical statements containing two algebraic expressions on both sides of an 'equal to (=)' sign.

Here, Let the number of 4 wheel skates in display be x

and the number of 5 wheel skates in display be y

Total number of skates = 17

Total number of wheel = 74

Now, according to question

x + y = 17 ................(i)

4x + 5y = 74 ..................(ii)

From equation (i), we get

x = 17 - y ................(iii)

put the value of y in equation (ii), we get

4(17 - y) + 5y = 74

68 - 4y + 5y = 74

y + 68 = 74

y = 6

Put the value of y in equation (iii), we get

x = 17 - 6

x = 11

Thus, there are 6 skates in store with 5 wheels.

Learn more about Equation from:

brainly.com/question/10413253

#SPJ1

6 0

2 years ago

Which equation represents a line that passes though (4, 1/3) and has a slope of 3/4

stiks02 [169]

Answer:

$\large\boxed{y-\dfrac{1}{3}=\dfrac{3}{4}(x-4)\leftarrow\text{point-slope form}}\\\boxed{y=\dfrac{3}{4}x-2\dfrac{2}{3}\leftarrow\text{slope-intercept form}}$

Step-by-step explanation:

The point-slope form of an equation of a line:

$y-y_1=m(x-x_1)$

m - slope

(x₁, y₁) - point

We have

slope $m=\dfrac{3}{4}$

point $\left9,\ \dfrac{1}{3}\right)\to x_1=4,\ y_1=\dfrac{1}{3}$

Substitute:

$y-\dfrac{1}{3}=\dfrac{3}{4}(x-4)$

Convert to the slope-intercept form (y = mx + b):

$y-\dfrac{1}{3}=\dfrac{3}{4}x-3$ add 1/3 to both sides

$y=\dfrac{3}{4}x-2\dfrac{2}{3}$

4 0

3 years ago

I need help with number 3 and 4. Please

noname [10]

For #3 the slop is 4/3 .

The y intercept is -5.

So the equation is

y=4/3x -5

6 0

3 years ago

Tom simplified an expression in three steps, as shown: x to the power of negative 2 multiplied by y to the power of 4, over y mu

ss7ja [257]

Answer:

Step 1, all the exponents are increased by 4

Step-by-step explanation:

The three steps are

(x⁻² × y⁴ /y × x⁴ × x⁴ × y⁻²)⁴ =
x²×y⁸/y⁴×x⁸×x⁸×y² =
x²×y⁸/y⁶×x¹⁶

Correct solution should be:

(x⁻² × y⁴ /y × x⁴ × x⁴ × y⁻²)⁴ = all powers inside the parenthesis should be multiplied by 4 as per power of the power (xᵃ)ᵇ = xᵃᵇ

This would give next steps:

x⁻⁸×y¹⁶/y⁴×x⁸×x⁸×y⁻⁸ =
x⁻⁸×y¹⁶/x¹⁶×y⁻⁴ =
y²⁰/x²⁴

Answer options:

Step 1, all the exponents are increased by 4

There should be multiplication of powers. (It is close option but is not fully correct as not all the exponents increased by 4, for example y became y⁴)

Step 2, the exponents of the same base are added during multiplication

It was done correctly

Step 3 wasn't performed yet, there was step 1 and 2.

So answers about step 3 are irrelevant

5 0

3 years ago

Jana ran the first 312 miles of a 5-mile race in 13 hours. What was her average rate, in miles per hour, for this first part of

MrRa [10]

Answer:

speed = distance / time

Jana's speed is

speed = (3.5 mi)/(1/3 h) = 3*3.5 mi/h = 10.5 mi/h

8 0

3 years ago

HELP I'm really bad at math​

HELP I'm really bad at math